Malicious PDF — malware analysis report

Static analysis result for SHA-256 0785c83b890d8c3b…

MALICIOUS

PDF

109.8 KB Created: 2021-03-15 10:22:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7a2630fd637dd33a831afde661c8d5ac SHA-1: 11cf0062f66f1e17884910e5674ef8f140723ab2 SHA-256: 0785c83b890d8c3bdfe999f958b80d618559bf2644c48373631aedd87fa7f975
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-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.
  • 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://jumiwimov.ru/wix?keyword=walmart+receipt+codes+canada PDF link annotation
    • https://cdn.sqhk.co/xinulezebi/6LCihjc/myrkur_folkesange_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/amdQEhi/michael_jackson_piano_tiles_3.pdfIn PDF document text
    • http://euromarket.pro/kegofuxolojufujoduvusijaj6kqe.pdfIn PDF document text
    • https://kaxutaxi.weebly.com/uploads/1/3/4/3/134387751/8374438.pdfIn PDF document text
    • http://yblda.fun/campbell_biology_11th_edition_with_mastering_biologyar4xz.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/gPjfhfO/15487485547.pdfIn PDF document text
    • https://ludiwutigavas.weebly.com/uploads/1/3/4/6/134697468/riketuperene-movubegug-vuvokojisolijo-pifolinevize.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/DvToicx/34719138600.pdfIn PDF document text
    • http://difavusimope.iblogger.org/notigezodopizaxakufo.pdfIn PDF document text
    • https://danevetiwa.weebly.com/uploads/1/3/4/6/134600357/bumimesad-pudavu.pdfIn PDF document text
    • https://pebuzifidam.weebly.com/uploads/1/3/2/8/132815752/tasevi.pdfIn PDF document text
    • https://lugarulanug.weebly.com/uploads/1/3/5/3/135383187/584457b2296.pdfIn PDF document text
    • https://cdn.sqhk.co/dodagirojep/f7nijwC/macos_file_manager_app.pdfIn PDF document text
    • http://jurogiriwizezaw.22web.org/catalina_island_trip_guide.pdfIn PDF document text
    • http://tinubawolu.mywebcommunity.org/69562009245.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://womawujun.atwebpages.com/explosive_stock_trading_strategies_samir_elias.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/xixafaxofegutajoseros.pdfIn PDF document text
    • http://gupexofuvesok.epizy.com/knewton_assignment_answers.pdfIn PDF document text
    • http://xulodolab.epizy.com/guided_meditation_script_to_reduce_stress.pdfIn PDF document text
    • http://jojasodux.epizy.com/biological_classification_book.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_off00016f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F00 5232 bytes
SHA-256: 6a25a5e3e5e2ff1242aaf03b05c6748a12bae809055fab06a8a11d10f46fa5a4
font_01_sfnt_off000180c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180C0 12044 bytes
SHA-256: c40f6b5b7dc29a8c6dab637b162b55bcabebfa0a2995021ef014751714f9ec4c

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