Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8652714e1606361…

MALICIOUS

PDF

112.1 KB Created: 2021-04-05 18:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e42a014713cfd69f12b6e8e5fa8cdb19 SHA-1: 585d5df80897d005af8826a38dcc6dbee1fc75a8 SHA-256: a8652714e1606361a97367468597c552c3275ccea46b2006b97663f7a40cabd4
186 Risk Score

Malware Insights

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

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 6

  • 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.
  • 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://golowaki.ru/strik?utm_term=what+books+does+the+torah+consist+of PDF link annotation
    • https://nanuvofekoredam.weebly.com/uploads/1/3/5/3/135385966/4ec24a9.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/ohd0jfa/puppy_runny_nose_eye_discharge.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/dWjcPgg/descargar_swamp_attack_hack_apk_2019.pdfIn PDF document text
    • https://debovibeki.weebly.com/uploads/1/3/4/7/134715081/06286.pdfIn PDF document text
    • http://fesufobototezer.mywebcommunity.org/gcf_worksheets_with_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/jcZnM1K/border_force_officer_jobs_scotland.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/127097530642io08.pdfIn PDF document text
    • http://copalofa.site/mupirofixixopej0xpu.pdfIn PDF document text
    • http://rokemefofiz.iblogger.org/annamalai_deepam_songs_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/2ic4jiR/serie_a_top_scorer_19_20_season.pdfIn PDF document text
    • https://fumitalabojaluk.weebly.com/uploads/1/3/5/3/135399187/perun.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/gchdjaG/lolegafofapolad.pdfIn PDF document text
    • https://wamogipoko.weebly.com/uploads/1/3/0/7/130739383/131564.pdfIn PDF document text
    • http://kittyplay.online/hatha_yoga_teacher_near_meznscv.pdfIn PDF document text
    • https://xizenarinirogav.weebly.com/uploads/1/3/1/4/131437147/xapawijurij.pdfIn PDF document text
    • http://nalodorepuwag.getenjoyment.net/tazivejuvexujesuzowevogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://midotujeg.rf.gd/kaluzarigad.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/line_6_pod_ux2_tutorial.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B2E 5292 bytes
SHA-256: 98e600f926e1cd3dab05ddfebf2fac1571383f22c7765bf2df2322d4a1272dc5
font_01_sfnt_off00017d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D34 18056 bytes
SHA-256: 95399cac74b0c3afc529140055d4bb3d9d73e25f5d51920f1350793b5c7a943e

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