Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a5d6352dc2936c…

MALICIOUS

PDF

73.3 KB Created: 2021-03-31 01:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 55764f5b19899f2acab74144764b70da SHA-1: f859bc690d3534501f1add7f0a926cda9118b1bf SHA-256: 14a5d6352dc2936c6721fcc21d206450a3cb09766157f2232775c637ad98c7cf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/wix?keyword=apexi+super+afc+neo+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4528780/normal_60348769dda51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_6063a512f093d.pdfIn PDF document text
    • http://mibasigomebul.iblogger.org/zivago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5fdbec50c425c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_606088a581952.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466666/normal_603f2aa9a4bf6.pdfIn PDF document text
    • http://bigigog.22web.org/41657754153.pdfIn PDF document text
    • http://gilitomenuxame.22web.org/munaxivetixagisuwoda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494160/normal_5fd66f449d6f9.pdfIn PDF document text
    • http://sarkife.site/hewan_vertebrata_dan_invertebratahzl6c.pdfIn PDF document text
    • http://gejodumegemato.22web.org/rikavomelegalufib.pdfIn PDF document text
    • http://skidki-day.site/25237235779dio7m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477626/normal_5fd2fb142ac33.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/a0c53624-e43c-4f30-a6f7-1434b76e6689/should_you_turn_your_hobby_into_a_career.pdfIn PDF document text
    • http://taweredatupiko.rf.gd/is_cyberpunk_on_steam_drm_free.pdfIn PDF document text
    • http://menikax.epizy.com/11712427486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90372ddf-f450-4a48-a776-46930735a133/zerisefeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9d603f-a7b2-4666-b4f3-8e529207a0d8/crochet_bag_pattern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/353958f1-0bee-4287-a9f2-4afdd3739973/42277261790.pdfIn PDF document text
    • http://vekamujibatebig.rf.gd/std_11_science_biology_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_off0000e094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE094 5216 bytes
SHA-256: 57338eb7a893fd681e8fb5fce129b2d93092be4a70155b1f16c00882130ca693
font_01_sfnt_off0000f243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF243 11156 bytes
SHA-256: b1ab03fb49b08b8ec3f15ab97b645ce91b0755220eae7b3322ca94f636d2a235

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