Malicious PDF — malware analysis report

Static analysis result for SHA-256 982036614baf4d65…

MALICIOUS

PDF

73.8 KB Created: 2021-03-17 19:23:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 22ef4579e28012d6cae583dcb0348219 SHA-1: 7e57e3ff7bff6b21c1257251b636293618d34899 SHA-256: 982036614baf4d65bdf891303dff9ad0c3bac72a2fd34ac4dec2f7c4d8732f60
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to a 'cartoon video app', and the numerous embedded URLs point to external sites, likely for phishing or malware distribution. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the malicious nature by identifying a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jumiwimov.ru/123?utm_term=cartoon+video+app+android PDF link annotation
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/gozaxegufojeko.pdfIn PDF document text
    • https://kukusekiwija.weebly.com/uploads/1/3/5/3/135389364/notatova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5fe6c3f6e5767.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426090/normal_5ffcdc2164d39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463306/normal_5fe4c4661cbc6.pdfIn PDF document text
    • http://axecheat8.xyz/how_to_train_your_dragon_4_homecoming_trailer5eae9.pdfIn PDF document text
    • https://ritosameb.weebly.com/uploads/1/3/4/2/134266106/60f5e8c1ae1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380699/normal_603250241f3bc.pdfIn PDF document text
    • http://premiumpornclips.com/baybayin_tagalogn5cir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484994/normal_5ffc74265f2f2.pdfIn PDF document text
    • http://paselon.getenjoyment.net/hansel_and_gretel_bakery_near_me.pdfIn PDF document text
    • https://gisipunav.weebly.com/uploads/1/3/1/6/131636927/61190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_600cebd1a2a7b.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/ramoxedo.pdfIn PDF document text
    • http://depusapo.mypressonline.com/8657447499.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DA 4708 bytes
SHA-256: 5c673c1d89e0529e38b0bac4d009422fc70eb43cca9b46fe90114665b9838912
font_01_sfnt_off0000f5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F0 10260 bytes
SHA-256: e0c87fb9ed9ae1310931eec465c73939271290ec0771a59c38be139c33dcc59a

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