Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a01c56d5327d1d6…

MALICIOUS

PDF

80.3 KB Created: 2021-03-22 11:18:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 71ff70a5c8c0bfbf28081684a5e47015 SHA-1: 292f523c39d362fa8c892149f547553a85d4536a SHA-256: 8a01c56d5327d1d61da458982093e4e9f4c510e0f19209151c29944c2ef9dcb0
126 Risk Score

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 0.9997

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 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://xezojetit.ru/wix?keyword=gizmo+phase+changes+answer+key PDF link annotation
    • http://jodefugivu.22web.org/ccu_full_form_airport.pdfIn PDF document text
    • http://lutusogugifuj.iblogger.org/what_is_freedom_for_you_essay.pdfIn PDF document text
    • http://kuzojud.66ghz.com/28010733170.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/80690747409.pdfIn PDF document text
    • http://gazorowegesejix.22web.org/58724087607.pdfIn PDF document text
    • http://werojati.getenjoyment.net/top_down_approach_in_reading.pdfIn PDF document text
    • http://nelilovodik.scienceontheweb.net/zekekujifojifobewijifare.pdfIn PDF document text
    • http://xexajume.iblogger.org/16191582347.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/volujez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xotujulenibol.epizy.com/temixajam.pdfIn PDF document text
    • https://43e3b293-20b6-4b74-9f7d-0eefffb4d2df.filesusr.com/ugd/11595e_10ee90ef33834409875ec79d1fedcf82.pdf?index=trueIn PDF document text
    • http://jilutuve.rf.gd/95833522324.pdfIn PDF document text
    • http://jijojigig.epizy.com/34089859967.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/bombay_blood_group_system.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/tiwokatuwa.pdfIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_e376be50542f4bdba0d1a1082db98c49.pdf?index=trueIn PDF document text
    • http://tenefotozefuzuw.rf.gd/pevini.pdfIn PDF document text
    • http://tisikifapov.rf.gd/wizards_unite_brilliant_event_guide.pdfIn PDF document text
    • http://wuliwopiveti.rf.gd/kipekexasajudedezew.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/glory_to_hong_kong_piano_music_sheet.pdfIn PDF document text
    • http://gaketolem.epizy.com/nezuvikitafezujeket.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1C 5656 bytes
SHA-256: e10396310317f6d902489eb6a13e52f9449d9c6f40e85debddae9f6afacbfc89
font_01_sfnt_off00010f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F55 10772 bytes
SHA-256: 01a2f6a5c9bd15471d2670cad7237066e20bb0eab0ec432e575246628e39b11c