Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3a748f596b3913…

MALICIOUS

PDF

78.3 KB Created: 2021-04-02 10:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2ee818a446607fc2357d80237c17a090 SHA-1: e0b6f90783ecf4f26bee5c6d2af8fefca7abfb4f SHA-256: 6f3a748f596b3913496a706fbd808e267d4572f6ba4804550c459a736313d64c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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 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.
  • 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://seumenha.ru/strik?utm_term=what+happens+to+mail+that+has+the+wrong+zip+code PDF link annotation
    • https://wamogipoko.weebly.com/uploads/1/3/0/7/130739383/9977934.pdfIn PDF document text
    • https://sikafajowed.weebly.com/uploads/1/3/4/7/134757433/vegom.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/heHndwZ/chicken_goat_cheese_asparagus.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxeneson/idjbjj9/xobupavipezize.pdfIn PDF document text
    • http://xikisavi.scienceontheweb.net/zezeki.pdfIn PDF document text
    • https://cdn.sqhk.co/vurifozi/hbplicA/45023202874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_60564e2542631.pdfIn PDF document text
    • http://gemajelibetojup.scienceontheweb.net/72434050297.pdfIn PDF document text
    • https://gukejokofa.weebly.com/uploads/1/3/0/7/130739315/76269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_6047b9032d483.pdfIn PDF document text
    • http://lowusonuraku.mygamesonline.org/12430009718.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/53fbbede.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/enxgiPi/monster_buster_hexa_blast_facebook.pdfIn PDF document text
    • https://viduxetejogat.weebly.com/uploads/1/3/4/6/134600114/2ade6c981d.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/febopa/how_to_make_toshiba_dvd_player_region_free.pdfIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_ebadf03fe58f43fb9d723d0a90746692.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/bpi_application_form_for_personal_loan.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/96319318607.pdfIn PDF document text
    • https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_0b5b191ebd7e49a69bde50ef47c57c82.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/work_rules_laszlo_bock.pdfIn PDF document text
    • http://vugugemo.atwebpages.com/exercise_on_present_perfect_and_past_simple.pdfIn PDF document text
    • http://dozuxix.myartsonline.com/gizebi.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/jazomipumekenusas.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_off0000f285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF285 5644 bytes
SHA-256: af5f43c6979684efcce6f0d84f21bf4510277f275ae0b4d08dcfa24d463672cf
font_01_sfnt_off000105a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A7 10680 bytes
SHA-256: 75b4ddd3b8c56714b2ffebeacb9599117e034408c9d2e836ac96291b3b61d18c

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