Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b6f4af4684387a…

MALICIOUS

PDF

130.8 KB Created: 2021-02-16 21:53:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ac1e89d90ee01457d1924fd5df9149cd SHA-1: f870b87dacb502fc60ccf8aed0cd7ad816a19b6a SHA-256: b0b6f4af4684387af92e3971d20618d38f263869865e721b785b5a3f5457682a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The presence of urgency language further supports a social engineering attack vector.

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 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.
  • 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/aws?utm_term=android+app+development+price+in+pakistan PDF link annotation
    • http://datekal.22web.org/nozuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/jhJmvic/wyze_app_not_showing_qr_code.pdfIn PDF document text
    • https://muvanuxeb.weebly.com/uploads/1/3/4/0/134096654/vogodufekupupo-tafunu-rokudebupe-sewezaxaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/nagebagem/Prieqgg/65687783051.pdfIn PDF document text
    • https://widosogepe.weebly.com/uploads/1/3/3/9/133986955/rabol_jopagakovuruko_jikat_togosower.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368984/normal_5ffbb7e50125d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388177/normal_5fcb9dd6b1282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478137/normal_602461e8ee515.pdfIn PDF document text
    • https://nanavefog.weebly.com/uploads/1/3/0/7/130775134/lesekokulazigefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387825/normal_5fd2ff60801dc.pdfIn PDF document text
    • https://sunowakodi.weebly.com/uploads/1/3/2/8/132814938/3771892.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/jaiamjf/36114524225.pdfIn PDF document text
    • https://ditakusoboke.weebly.com/uploads/1/3/1/4/131437623/66b3fd04e46.pdfIn PDF document text
    • http://livopazumifena.iblogger.org/basexuzukuli.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/v0jfggS/snapped_off_synonym.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zerimokima.rf.gd/vizewokemawapunosarokevex.pdfIn PDF document text
    • http://dixasimoxipux.rf.gd/west_branch_ausable_river_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/clauses_and_complex_sentences_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/87507332523.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C40B 5332 bytes
SHA-256: a23405776a31ed2f0b53199a05634df1ba1f152ea8b3926ff49c546bb2eb66d2
font_01_sfnt_off0001d620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D620 11728 bytes
SHA-256: 824ef1c4b1e31d4af1eaf4e4996e454b94852739508ff2c1d954cfd1545b7a0e

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