Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cede7623bd6429c…

MALICIOUS

PDF

70.6 KB Created: 2021-02-16 01:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e681ed999a4a92ff875dc92bc42fb496 SHA-1: aa7ac124ef8f2d06e069f87315af2e0d3f2570d2 SHA-256: 9cede7623bd6429c51d039e7a7fb1c0ae5ff5275e1de8b4a6e588b1a33413e4a
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary one pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to 'Sims 3 patch notes meme' to entice clicks on the malicious links.

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://jottigo.ru/strik?utm_term=sims+3+patch+notes+meme PDF link annotation
    • https://cdn.sqhk.co/petebeki/eyzjbib/48866265689.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495402/normal_602afd44d2ec4.pdfIn PDF document text
    • https://kiligazifozu.weebly.com/uploads/1/3/4/5/134506598/zupirivomivebe-xixukabudef.pdfIn PDF document text
    • http://bijipejip.iblogger.org/juvogowar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496015/normal_5fdbe45f4fda1.pdfIn PDF document text
    • http://ifeelgood.club/ppsspp_football_games_2017oqg26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460963/normal_5fe39c32502aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375353/normal_5fd89a1934444.pdfIn PDF document text
    • http://indital.space/btd4_unblocked_hackedozcx6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://serumisa.epizy.com/tojunobazufe.pdfIn PDF document text
    • http://xesesopid.rf.gd/analog_to_digital_converter_nptel.pdfIn PDF document text
    • http://wusumuforibit.epizy.com/nagij.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_off0000d86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86B 5312 bytes
SHA-256: 17f80b4ca04aba6213c2c6fa875dc5604e1669ae2550cf2192c7579d06d1d9b4
font_01_sfnt_off0000ea53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA53 10276 bytes
SHA-256: 12578b0ffb52218fdb7843846ed4ba0d7604dffcff8d396a9cbd99eabc25cc54

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