Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9380e95d0f795f…

MALICIOUS

PDF

74.4 KB Created: 2021-02-01 08:55:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0d6cd65c0b6493904297381d6bfe1773 SHA-1: 66799711c5f7a8939c2e0b5569ddbb427708fac7 SHA-256: 8a9380e95d0f795f6b0c2ee0fa7d3c03ef126eb3f52ca491ceab42d34769e089
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF's structure and the presence of many external links suggest it's designed to lead users to a compromised website, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/aws?utm_term=digital+divide+data+annual+report PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403561/normal_6003fc15af163.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/Dtllgg0/8937571444.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/jdhiqii/the_lighthouse_of_alexandria.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/Ggf8sif/35344636575.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460968/normal_5fcd3d2ddc3fc.pdfIn PDF document text
    • https://fukuzodi.weebly.com/uploads/1/3/5/3/135329923/5afb72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373508/normal_5ff11bd81a80a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486201/normal_6000d4b8d920c.pdfIn PDF document text
    • https://zororoxuz.weebly.com/uploads/1/3/4/3/134309160/mizinenupodozopad.pdfIn PDF document text
    • https://vinenuji.weebly.com/uploads/1/3/1/4/131453259/mefuwuwovaroxa_ragubox_kakuxanav_lilakeris.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/aieihjj/97537973597.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5ff812fd728ce.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/thbsIjh/radio_nederland_fm_radio_online_radio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tifuwuw/gilolizetekexefozu.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/45011620655.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/payroll_system_proposal.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/fowamexajiwesas.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/kilanuxatebogija.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/gdpr_right_to_be_forgotten_request_template.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/anaconda_python_3.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D8 4892 bytes
SHA-256: 273ae50ea4a997a0d29d2025cfe2eb9bba4471e9d5af3277010a73cae2b88157
font_01_sfnt_off0000ea8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8D 10436 bytes
SHA-256: 1e13232e21208154b3559318f0122209d77bd4fc05b6ff63ec0fa51a59cbc7ee
font_02_sfnt_off00010e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E46 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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