Malicious PDF — malware analysis report

Static analysis result for SHA-256 7efaee877c15762f…

MALICIOUS

PDF

242.3 KB Created: 2021-03-31 23:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d63c2f52126b5b783e2a76b2c92bfd65 SHA-1: bb07b55febd4f33b488326d44b6cf845834f1243 SHA-256: 7efaee877c15762f2ca5cc36a02fd6d503916b41ebe4a70202adeb9f52e28459
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it's a phishing lure, specifically using an SEO redirector to a suspicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI point towards exploitation or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://resalured.ru/wix?keyword=ruki+the+gazette PDF link annotation
    • https://cdn.sqhk.co/bafiweba/ehaggja/social_media_marketing_plan_example.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/bSrhcjg/logitech_light_up_wireless_keyboard.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/eiiDj1g/fozunojiwu.pdfIn PDF document text
    • http://ribugiwegi.22web.org/zahhak_the_demon_king_summary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://safuzidavoje.rf.gd/kolosokadaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dea6576-f2e2-4c7f-847a-658840039de3/96911144746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c85cead-011f-48cd-b2a7-8354e3d77415/formulas_de_volumen_y_area_superficial_de_cuerpos_geometricos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a13b17-6ed7-41b1-965c-23ef928b3be7/sig_p229_40_sw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6ba298-a642-4bca-937e-6767da9bdea3/how_to_run_a_diagnostic_on_a_whirlpool_dishwasher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07c2999-d726-43bb-aef1-9f0fca2bb8da/16348662144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a411ed3e-19ae-4408-86c6-ba5f45a10e17/38495948583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be32c190-101e-4eb9-96f2-00414c9442ce/vezivodaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/614a6b59-8f6f-49ba-8ebc-2d57420ecd9d/hearts_of_iron_3_ww1_mod_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aacdb24b-8807-4834-8f5f-a04896f5c9ff/pedomizolemarezoselep.pdfIn PDF document text
    • http://givaxolek.epizy.com/do_i_need_a_license_to_apply_eyelash_extensions.pdfIn PDF document text
    • https://ecc4b077-82d2-4cf1-ad45-1e482560a890.filesusr.com/ugd/5d7ac5_89c89329738d40fb95cf4e434a18723f.pdf?index=trueIn PDF document text
    • http://gepuxaxevo.rf.gd/netidexibas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d75b9842-1934-4cd1-9afe-af3f2eab6764/36481787592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54fa41ac-4fc9-4b94-b05b-d729810c409e/bundaloo_claw_machine_arcade_game.pdfIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_0eb9b397a0f74c35b53de272dbdbee67.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13335 192036 bytes
SHA-256: 3659616d83d107190b7dfcd077bb26080984266bbe11531f7740ad395571bfa5
font_01_sfnt_off00036e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36E5B 4760 bytes
SHA-256: 4ab4d3a6c3675f9378bed95136792b7cd569a68daf681e3868a511269c4a9800
font_02_sfnt_off00037e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37E9D 10872 bytes
SHA-256: f1dda1219b36460e15c43a9f42fcab1a34a13dadb2cfdaff4ab6b666e98f7154
font_03_sfnt_off0003a460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A460 16076 bytes
SHA-256: 52e82f317fd07460633fde2b4a13b2271e088719cba8b5abc0141cb327413dbe