Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aaf1070970612e3…

MALICIOUS

PDF

81.8 KB Created: 2021-04-03 14:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 018040f74055e7c4c4c088d9749a0066 SHA-1: a1a9df368709896a7a36e5de9075674bd0a976a3 SHA-256: 5aaf1070970612e355597a71b172ff7a1a5c6ac65e0259b67e8e2570bfcd2046
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that redirect to a link farm, suggesting an attempt to obfuscate the final destination and potentially distribute further malicious content. The document body's reference to 'generational curses' is a common lure to entice users to click on the embedded links.

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://fokemale.ru/aws?utm_term=what+does+it+mean+to+break+generational+curses PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417999/normal_603f2d1db8f54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447097/normal_6041a9584c099.pdfIn PDF document text
    • https://wazepitufakox.weebly.com/uploads/1/3/4/7/134735855/2775352.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5feded15a0616.pdfIn PDF document text
    • https://ruwawowek.weebly.com/uploads/1/3/2/7/132712040/visifujevejote_sitisuzu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496582/normal_5fd03016a25a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501231/normal_6022495438c67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476954/normal_5fde61ab61bd9.pdfIn PDF document text
    • https://lulefimoka.weebly.com/uploads/1/3/2/7/132740328/ce27bb7.pdfIn PDF document text
    • http://wavakidagipav.iblogger.org/sibisotoxerevifarajojise.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470228/normal_5fcc447f1b18a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455406/normal_6020b35ddec5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485149/normal_5fcfa14a5ba4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xikisefux.epizy.com/hematology_tests_explained.pdfIn PDF document text
    • http://pinogizege.rf.gd/air_cooled_chiller_system.pdfIn PDF document text
    • http://rubabup.epizy.com/83699531117.pdfIn PDF document text
    • http://suvoxezol.rf.gd/konutoxegimipexudif.pdfIn PDF document text
    • http://tagabeweme.epizy.com/43613642249.pdfIn PDF document text
    • http://vogafaxusa.epizy.com/acrostic_poem_examples.pdfIn PDF document text
    • http://gowatane.rf.gd/ruborebiwalefize.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_off000100cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CF 5568 bytes
SHA-256: 767aed76962f9a351a3ba8147d9555ed75e4d24f7c6ed8019f5c9f1a3b846b3b
font_01_sfnt_off0001139e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139E 10612 bytes
SHA-256: b8ecd475bb36b2cf1c69bef3864082321b717ff777c36f25f18efb1781fa5720

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