Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e21e454f5d797e…

MALICIOUS

PDF

301.9 KB Created: 2021-04-19 19:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a4dc40b6c21d0d8e4401b661d38e0aa7 SHA-1: ef001d9410087a35d9f8e28323b50a9ddc02048f SHA-256: d8e21e454f5d797ed87931f02163d3adaa678b6b84ed36ecc3f402b262187d93
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating it's a phishing lure, specifically using an obituary as a pretext to redirect users to a malicious URL. The ClamAV detection further supports its malicious nature. No scripts were extracted, but the presence of a redirector URL suggests an attempt to deliver a secondary payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4216

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/strik?utm_term=frank+hammond+obituary+peterborough PDF link annotation
    • http://interior.estate/riello_burner_nozzleb2fr1.pdfIn PDF document text
    • https://wofovado.weebly.com/uploads/1/3/1/8/131871653/kulokesivavadafezu.pdfIn PDF document text
    • https://xujufefar.weebly.com/uploads/1/3/1/4/131483110/videtafaro-dilagomunima.pdfIn PDF document text
    • http://triple-doska1.club/been_together_app_apkf3761.pdfIn PDF document text
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/4286f514031.pdfIn PDF document text
    • http://pufonorigaji.22web.org/biblical_counseling_handbook.pdfIn PDF document text
    • https://cdn.sqhk.co/silijebutu/cyiihVj/fasewakug.pdfIn PDF document text
    • http://urro-hu.com/what_is_the_meaning_of_miracles_in_the_biblelsdvr.pdfIn PDF document text
    • https://bagopilijesab.weebly.com/uploads/1/3/1/4/131438775/43b5e3228cde4.pdfIn PDF document text
    • http://vitonidero.medianewsonline.com/timifabolisededatu.pdfIn PDF document text
    • http://kejumazinanu.mywebcommunity.org/welding_machine_circuit_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/wisivelu/ijBjcYG/29349225642.pdfIn PDF document text
    • https://cdn.sqhk.co/wokuvaxevaji/aghigje/fomesorejifosisak.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxafopagad/MQifiiY/real_drift_car_racing_apk_mod_money.pdfIn PDF document text
    • https://majijajivetik.weebly.com/uploads/1/3/4/2/134265766/jomukokefage-xamakokiwuxaw.pdfIn PDF document text
    • http://tiriruno.sportsontheweb.net/kanidek.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/p90x_abs_routinevemlo.pdfIn PDF document text
    • http://domsale.xyz/ap_style_checker_free_online0vh40.pdfIn PDF document text
    • http://jobepam.iblogger.org/twilight_breaking_dawn_part_2_full_movie_in_hindi_part_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://retiziwo.myartsonline.com/paginaxijidaxosofu.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/sitesefipuda.pdfIn PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_725a3e8341dc47c8b7fa7316129057b9.pdf?index=trueIn PDF document text
    • https://394fded3-a37f-45fe-8092-07e0884d2d31.filesusr.com/ugd/bdbc91_ea76ef702fea4c7f92bfb7f02ffe5e7f.pdf?index=trueIn PDF document text
    • https://1b3e2d6a-0348-4772-9bb2-16e56a761455.filesusr.com/ugd/7bcf02_266c537c560040dfa32b1c18a8aea188.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off00044435.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x44435 29172 bytes
SHA-256: f78931c18613c7ed714b50f75670745ac0cd92a44e64a68927bf321d877809bd
font_00_sfnt_off0002a5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A5AE 71128 bytes
SHA-256: 993c03acdb45e5cce276ad66a1fd8884da9cc19c6c225fd993e3c220ae553689
font_01_sfnt_off00037d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37D9A 5304 bytes
SHA-256: 9d277f33cc324ee0d18d48d4e3105b9d9994b94b4ce8ddaeb9cdc5475075de0b
font_02_sfnt_off00038f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38F7A 6460 bytes
SHA-256: 4af6ff87be7827978c2a8d00590101fdec74d3623229568f386f2764b5b558dc
font_03_sfnt_off0003a3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A3A7 10072 bytes
SHA-256: ce8e35ccd128caf15080dbcc5813d3eaa1e38ba0cd0d1e15dac1bfd6c7f85c81
font_04_sfnt_off0003c314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C314 5620 bytes
SHA-256: 19e3b67bdd9585e018185f9f329550bc38074b16bfa840445aa94f3911209ef6
font_05_sfnt_off0003d770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D770 8732 bytes
SHA-256: b3bf0b63d28d300d343e9b137ca5bd1f319be744812c5b2e9edafef98694bfe3
font_06_sfnt_off0003f151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F151 33840 bytes
SHA-256: 379fcb941934dfbafbed914a5f1cf442e4e26c2c08dda9e4786f4685c9b687d5
font_08_sfnt_off00047c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47C0F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
font_09_sfnt_off00048a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48A18 8324 bytes
SHA-256: 3542323e4ebe372f114409b9be671125bffff0d9f9a8257358755df80c492445