Malicious PDF — malware analysis report

Static analysis result for SHA-256 aceb623a7a10ce4c…

MALICIOUS

PDF

71.5 KB Created: 2021-04-01 23:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dd2df968410b91d3dfa4d889b61511a9 SHA-1: 754efc5afe4ef467e8c295d50de1406cbf311a06 SHA-256: aceb623a7a10ce4c3b36d8728434b8a4b18e55ba54eef60fb49ca1a55fa06ec9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least two pointing to disposable hosting and acting as link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords that appear to be lures for unsuspecting users.

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://midufefew.ru/strik?utm_term=taco+bell+power+bowl+veggie+nutrition PDF link annotation
    • http://pokovata.scienceontheweb.net/jarasidozikanofe.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/65400795903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465269/normal_602b4d601ff91.pdfIn PDF document text
    • http://jakor.pro/hp_4500_printer_cartridgev1b2z.pdfIn PDF document text
    • http://help-copyrightservice.xyz/can_you_day_trade_crypto_on_coinbaserpnyu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390374/normal_5fd7b5c2a9a80.pdfIn PDF document text
    • https://cdn.sqhk.co/jelobasuzet/afx1jgf/whirlpool_microwave_manual_wmh31017as.pdfIn PDF document text
    • http://shothard.site/united_pentecostal_church_sermonsi8156.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/giBdRL8/didonobarufibupepu.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/how_do_you_provide_safety_in_the_workplace_response_brainly.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479673/normal_6004e17b74a59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446512/normal_60658b3e0d655.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_32be5bb4f79b49e589995a00460bedfc.pdf?index=trueIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_be1a4e9f40914f60ac29de33d6510425.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/saxefi/gotofoxamekuturu.pdfIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_138bf69cc0af4ad88322e7dd81b68275.pdf?index=trueIn PDF document text
    • http://dajomilot.atwebpages.com/5739988279.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/69981076228.pdfIn PDF document text
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_40348739e32d4839ba4030d6cb8d67ca.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD984 5164 bytes
SHA-256: 8c03fd460d3360a10c9a53e38fd9e9711bce6278831e5620a2fd4fd766d91750
font_01_sfnt_off0000eb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3E 10888 bytes
SHA-256: 00f2945f81d3b51c1cb860e7f662c58a768050f0a975de2456c5c06383157b66

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