Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60e101ea925e0f8…

MALICIOUS

PDF

83.4 KB Created: 2021-03-02 14:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d73630d598843e732703d523b83a1866 SHA-1: 901f812e25f5fc9180ce2b1e37605d058a56f5be SHA-256: a60e101ea925e0f89cb8a964795e1ec7ce7963709bdd3d3c9e106d013e51ece9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/strik?utm_term=cat+goodwill+meaning+in+hindi PDF link annotation
    • http://betijeduw.getenjoyment.net/whose_child_is_this_song_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/ba5jdgh/xusalunafi.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/Diciemw/samsung_music_apk_free_download_old_version.pdfIn PDF document text
    • http://detonic-ro.website/dls_19_mod_profile_daton13m.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/gesowusolasezusebotivipi.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/98707170796.pdfIn PDF document text
    • http://com-copyrighit.com/how_to_put_a_simmons_baby_crib_togethernqbee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_6028143fac998.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/warcraft_3_reforged_review_october_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482880/normal_600a0430a1154.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/61240626401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_6017184f8be2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489263/normal_5fe3081cdc034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_6025d0518d659.pdfIn PDF document text
    • https://cdn.sqhk.co/dimowitop/uhapiFf/depisikasojikeluzugapij.pdfIn PDF document text
    • http://salonop.xyz/fefusavobemomevavafat7foi.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://kisalonokexiwi.atwebpages.com/educational_psychology_woolfolk.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/berwick_upon_tweed_map.pdfIn PDF document text
    • http://zipulosi.atwebpages.com/nijibowukedatokimib.pdfIn 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://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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF34 4964 bytes
SHA-256: 67adbd54daa08bf6e1d2c1d9a236871699b62b2cc09c1014174edda8a28b8790
font_01_sfnt_off0000fffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFE 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off00010b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B60 10136 bytes
SHA-256: b97b5e6e85e43e3ae819263ab81631809ff9319f5813f542c11fd127092ebc42
font_03_sfnt_off00012e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3C 4752 bytes
SHA-256: abc2635b5b930badea6c142f1b5a12845340cfc96bb55030b915c52eb87c3102

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