Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d1567bc08f6746…

MALICIOUS

PDF

76.6 KB Created: 2021-03-10 22:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8692d6206414b0a53cad8de0dbc95796 SHA-1: ba451a65bc28098eed025a066435e7f7007a6db8 SHA-256: a8d1567bc08f6746a6d2d01f80aa4e75a4e1fc081809d020dc903cce2f2c3fee
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though partially corrupted, suggests a lure related to a 'Ford f250 service manual', which is likely a pretext to disguise the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/strik?utm_term=ford+f250+service+manual PDF link annotation
    • https://tivifetanesa.weebly.com/uploads/1/3/5/3/135347176/zexogojodejegug.pdfIn PDF document text
    • https://bipufufutugudov.weebly.com/uploads/1/3/1/1/131164095/be092eda17fb.pdfIn PDF document text
    • http://ruwegekugite.22web.org/budismo_para_dummies_descargar.pdfIn PDF document text
    • http://dujifasuda.iblogger.org/chemistry_lab_report_introduction_example.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392877/normal_5ff31e04478c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459941/normal_6014d534ccdba.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/exhaU9x/disawapafigawa.pdfIn PDF document text
    • https://kopabiziruzoxol.weebly.com/uploads/1/3/1/4/131406592/loxek.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/cZKRhh4/13292575036.pdfIn PDF document text
    • https://xiforamuti.weebly.com/uploads/1/3/4/6/134611992/pelofuviwuzi-lejum-kipimilini-wuxejovepope.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://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_aefc88984d914b2eacc5e18f1d42d4ce.pdf?index=trueIn PDF document text
    • http://baverasoge.epizy.com/compliance_officer_report_format.pdfIn PDF document text
    • http://sowezenuvafe.epizy.com/is_kaz_brekker_in_shadow_and_bone.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/pinofopofilazufufepozix.pdfIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_71a2f66578c54c00988ec1539c34d2a0.pdf?index=trueIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_a3acc35f1dde4155a3ac64f77452d7af.pdf?index=trueIn PDF document text
    • http://vedapasu.epizy.com/how_to_log_into_my_live_email_account.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_off0000e312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE312 5384 bytes
SHA-256: 4996c794932ec40a379e43f9d9389885c9d8d07a1cc7fcc7afdc488f3ff27f19
font_01_sfnt_off0000f549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF549 9948 bytes
SHA-256: 27a50a3bdd4bfa1dab805e74e9161dcc036aad3b44ae30fa85c1e5d0e5513eba
font_02_sfnt_off0001173c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34