Malicious PDF — malware analysis report

Static analysis result for SHA-256 347f357838ca9e53…

MALICIOUS

PDF

75.9 KB Created: 2021-03-03 08:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 902316354d21ebc6577f50c98861f1c1 SHA-1: 2d33d1a8d4094c24b492a602cba5dfc42a44a403 SHA-256: 347f357838ca9e530d7d949ca1c09732dfda257b498b5533346c821b3e778574
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high number of embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://resalured.ru/123?utm_term=dell+inspiron+one+2320+windows+10+video+driver PDF link annotation
    • http://meetsol.xyz/neptune_t-10_3_4_potable_water_meter_-_measuring_in_gallons94ofp.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/18575025570.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/wotorizewinemonegatufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454422/normal_600d703633f7b.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/gerund_infinitive_grammar_exercises.pdfIn PDF document text
    • http://lbaranaydin.com/45234698812dcrxd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470408/normal_5fdc42ee58ebc.pdfIn PDF document text
    • https://vigobekopu.weebly.com/uploads/1/3/2/3/132302998/lonuponidibo_wuweriwusoduwek.pdfIn PDF document text
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/f5fbea2be0991a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384164/normal_5fd2432e8396a.pdfIn PDF document text
    • http://salearea.pro/us_army_special_forces_training_pipelinemhyky.pdfIn PDF document text
    • http://rollernefritmassage.xyz/genetics_mcq_with_answers226b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373755/normal_5fcdb0ec23c71.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/zirixobi.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/nemafu/vevojonar.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/84749513104.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 5

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_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 5384 bytes
SHA-256: 19baba7906599a866f61cd0a1d072eea05c34e0bbbda9599078107a94e3bf0e6
font_01_sfnt_off0000fd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD70 10968 bytes
SHA-256: 1336593e04b5a65919450cd902168896049ddbe39452af80b38e6e00a6d5dede

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