Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff11e049545efa4…

MALICIOUS

PDF

109.2 KB Created: 2021-03-27 13:57:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d14aa3724741afcc9a1589ca49c630d5 SHA-1: d74897f0c5a9502b2bef721c8eb471369bf338fc SHA-256: 7ff11e049545efa4f73048c17b93ccc9191cadd44896458c247c13acf1b47ac3
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous external URLs, including one pointing to 'seumenha.ru', suggesting it's designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, appears to be a lure related to engineering salaries, a common tactic for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=how+much+do+engineers+make+in+pakistan
    • https://lusenivusimutom.weebly.com/uploads/1/3/4/8/134887898/dudajevitiwufo.pdf
    • https://xaweworamek.weebly.com/uploads/1/3/4/6/134610398/dobawagunizim.pdf
    • https://cdn-cms.f-static.net/uploads/4367301/normal_603f003ddd14f.pdf
    • https://static.s123-cdn-static.com/uploads/4422622/normal_5ff3c6bbb0e44.pdf
    • https://vegebawijinewer.weebly.com/uploads/1/3/2/7/132740558/supaxilezaxujip-kaleriwidisoko-gutixokikabenog.pdf
    • https://pifabevab.weebly.com/uploads/1/3/4/7/134721676/4847709.pdf
    • https://cdn-cms.f-static.net/uploads/4471704/normal_604493e16e3cb.pdf
    • https://cdn-cms.f-static.net/uploads/4367301/normal_605d79650fb26.pdf
    • https://cdn-cms.f-static.net/uploads/4459027/normal_602972f80324c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://soxerufazele.rf.gd/bingo_template_free.pdf
    • http://viveguwoxifug.epizy.com/83319771889.pdf
    • https://s3.amazonaws.com/nakevoja/kenmore_elite_ultra_wash_dishwasher_parts_list.pdf
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_de38264d9f824388b1996a3209f6ac3a.pdf?index=true
    • http://kuzebelinebofe.epizy.com/58035894826.pdf
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_3c41ae736baf410d8476588a9f6b7128.pdf?index=true
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_374b94c7e4a54b9c9f8c4f73ee5d58fd.pdf?index=true
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_f9ca7ab4933c4941b78bc052e5e0b08d.pdf?index=true
    • https://s3.amazonaws.com/jajoxulabojaso/asus_z97-a_m.2_compatibility.pdf
    • https://s3.amazonaws.com/xasovewipeje/zte_warp_elite_case.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015d09.bin
84974f223bc8fdc7d57fa3828cf24de0cc9593837327d523d4cd9dce37a0722f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D09 5456 bytes
font_01_sfnt_off00016f7e.bin
18f0cdce619da8de44d298323a1f766e9ba4c6205819057661fc2f01d729ce23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F7E 11748 bytes
font_02_sfnt_off00019761.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19761 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.