Malicious PDF — malware analysis report

Static analysis result for SHA-256 51da06fb21da1225…

MALICIOUS

PDF

73.2 KB Created: 2021-03-22 14:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bc38f7de98c701e554b811be4f152b35 SHA-1: 57055f3ebae08f3d005faee2b0fd6bd72e2ea0b9 SHA-256: 51da06fb21da12255669b825ff79bbee97d1874763818b6cca9706126a808f52
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 0.9997

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 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/award?keyword=convert+pdf+to+autocad+drawing+online+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495392/normal_6010852b57298.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvotalek/httjhhg/duneponudegixaxos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409409/normal_5fe5e429aad1d.pdfIn PDF document text
    • https://cdn.sqhk.co/pimabosi/ghdQijn/flower_garden_plans_for_full_sun.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/hihSEgd/pozitejatebulisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475577/normal_604177b6a08c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409405/normal_6020bee82d2ae.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/jchbieN/67472594048.pdfIn PDF document text
    • https://cdn.sqhk.co/davusegeb/GXid3l9/53633055826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_602512bd474dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_6044a690a52b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456379/normal_604106e61aba6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/153e0e74-80aa-4823-8512-0ce1b07c7bf6/seven_years_old_lyrics_clean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e859ee0f-d27b-46a0-9e6b-e2d144ee322c/kiwitixaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d110a0b-5cda-4818-95ef-0c74de2a7dd9/does_baloo_die_in_the_jungle_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/how_he_loves_us_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ea2996-4f6c-497f-9640-6c8cad87ce86/oster_ceramic_waffle_maker_flip.pdfIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_98ed632c8a1343fba4bab54955766c9b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rorives/bhojpuri_video_gana_hd_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/743b7c46-4f63-4167-9adf-561d06234486/how_to_say_drivers_license_in_spanish.pdfIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_370cd992ed454aa286fabc191f7d4e9d.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 6

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_off0000deed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEED 5200 bytes
SHA-256: ea9a450e7bffecd72653f228a67273e36484ced42a084157ef88c22dce40ade5
font_01_sfnt_off0000f0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C5 11192 bytes
SHA-256: 24dda6def1ea8a4032653c002afa475e63fccb9d798dc3b2f24faec149c07335

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