Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa51d407dab3ddf…

MALICIOUS

PDF

76.2 KB Created: 2021-04-02 19:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 71dfa02c305d2fdf61a02314ed9fbe9c SHA-1: c2124892f1b72c19b0afd9bbe87519c39ef13644 SHA-256: 7fa51d407dab3ddf9ea905c1d04a517465b5720c99591e911f990801aa6278f0
164 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. It uses an urgency-based lure. 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 0.9998

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.
  • 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://maypoin.ru/wix?keyword=download+gaana+app+apk PDF link annotation
    • https://kekufakaxuw.weebly.com/uploads/1/3/2/7/132740700/9061085.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/65719337256.pdfIn PDF document text
    • https://lovelutunaguj.weebly.com/uploads/1/3/4/7/134735325/42fa25fca7206c1.pdfIn PDF document text
    • https://cdn.sqhk.co/nobipajami/jaYDK9M/starting_lineup_for_nascar_race_at_daytona.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/ia4khjh/function_composition_notation_worksheet_answers.pdfIn PDF document text
    • https://rokawutavepuma.weebly.com/uploads/1/3/0/7/130776645/riwuruze_garawemumisawa.pdfIn PDF document text
    • http://xubajur.mygamesonline.org/95354413329.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/69993707202.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/my_car_says_service_tire_monitor_system.pdfIn PDF document text
    • https://lefiletigej.weebly.com/uploads/1/3/4/5/134597596/xapul.pdfIn PDF document text
    • https://sifapovidajep.weebly.com/uploads/1/3/0/7/130738911/sararemes.pdfIn PDF document text
    • https://sidunijutama.weebly.com/uploads/1/3/1/1/131163786/lafitunifif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lawakux/where_is_the_flame_sensor_on_a_luxaire_furnace.pdfIn PDF document text
    • https://d6bf9bfb-c092-4b17-ab9f-91da83e6a9d2.filesusr.com/ugd/d7ad14_4116c09c49314316b6feffc69fe00d62.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fivebo/appvalley_apk_installer.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/bayan_video_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/non_profit_bylaws_template_maryland.pdfIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_974526e4493b4385875836dd655f6f16.pdf?index=trueIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_7be82eda36934774b0fd57d97f464c83.pdf?index=trueIn 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_off0000ec56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC56 5008 bytes
SHA-256: f19f8a0fc35645e916e841478356abc9dc6e220802b457fd50b971518328293d
font_01_sfnt_off0000fd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD93 10692 bytes
SHA-256: 8cf8c4754fe12887f3d35edfe273bbb3588fd06da69fe19bbb447a66a03189f4

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