Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee02aaec8991325…

MALICIOUS

PDF

75.0 KB Created: 2021-03-04 21:09:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 91ecfa735a4fe585ed2615d48a78c160 SHA-1: 3da0b529f5d523edb9c0387717fc298858f4e06e SHA-256: 2ee02aaec89913250f481140898313fa493d18fc594b35b169af7d979617f537
244 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to disposable hosting services or known malicious redirectors. The document body, though heavily obfuscated, suggests a lure related to 'how to tie a toga out of bed sheet', likely a pretext to disguise the malicious link farm. The presence of ClamAV detection and ML flagging further supports its malicious nature, indicating it's likely a phishing or spam distribution tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://dafemum.ru/award?keyword=how+to+tie+a+toga+out+of+bed+sheet In PDF document text
    • https://fomunova.weebly.com/uploads/1/3/4/6/134684458/mofowoxukuz.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/WKkrXgh/97362280445.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/jhNd6hh/35489371863.pdfIn PDF document text
    • https://perepori.weebly.com/uploads/1/3/4/0/134016710/0f48ce5c7a03371.pdfIn PDF document text
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/keputupaxokafebib.pdfIn PDF document text
    • https://xemegejimeje.weebly.com/uploads/1/3/1/6/131636808/tuzerokavekares.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_22177b8223be44378f791c1edb031560.pdf?index=trueIn PDF document text
    • http://nifubaj.rf.gd/bribe_informally_synonym.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27ff1a3d-ac3e-433a-832d-02fb0c387a26/what_type_of_oil_does_a_briggs_and_stratton_generator_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0872e287-fcbf-4dbe-909e-870c07ff5160/does_apple_tv_4k_support_hbo_max.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860d7467-ab87-4543-800e-b6479defa863/what_degree_is_needed_for_operations_manager.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6710b644-7aa3-47b8-9d56-227577c23d2f/how_much_money_does_a_cfa_make.pdfIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_951f0bcd49144affb971324b88610325.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1c93c5-610d-4d2e-b252-aba3cfcb39d3/meroxenomujuze.pdfIn PDF document text
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_9f8d323287ec4deda328d0883872868e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9843e7a-dcd4-41e7-8214-b87ef43311a1/masitibagoxuvedifapom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e730235-f5f9-417f-99a6-a1694cc7e229/87297177396.pdfIn PDF document text
    • http://rugokabiko.epizy.com/jkbose_12th_class_private_date_sheet_2019.pdfIn PDF document text
    • http://rogoxeruf.rf.gd/vereto.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_off0000eaaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 5236 bytes
SHA-256: 8062f0eeb6ffa658c9bccf49d8eb81b1d0497b9523c8d373b454196f22de50ae
font_01_sfnt_off0000fc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8E 10056 bytes
SHA-256: c35e1f76527bb5058266fe18499f143ba522f3dc8aabeb74a656aeb7ba0b4398