Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c2e4036c14afaa…

MALICIOUS

PDF

83.5 KB Created: 2021-03-18 05:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0d4b6c1a8820333d0147f7b3143a790 SHA-1: 717442352ca2488df15eb756b88544ab35f94c89 SHA-256: b0c2e4036c14afaa27f8d71d90183186741325847def0a65ebfba2ac774a7219
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many of which are likely part of a link farm designed to direct users to malicious content. The document body, though heavily obfuscated, suggests a lure related to a price guide, which is a common tactic for phishing or malware distribution. The presence of external URIs and the overall structure strongly indicate an attempt to exploit users via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=2015+gypsy+queen+price+guide
    • https://cdn-cms.f-static.net/uploads/4466153/normal_6016e30fd7775.pdf
    • https://cdn-cms.f-static.net/uploads/4450043/normal_60450eff10662.pdf
    • http://instapriz.site/bizukupux8reoy.pdf
    • https://zonerizarom.weebly.com/uploads/1/3/4/3/134310007/503e17518.pdf
    • http://online-bestshop.xyz/surely_youre_joking_mr._feynman_audiobook_free_downloadefj3s.pdf
    • https://static.s123-cdn-static.com/uploads/4459463/normal_5fc88911a511b.pdf
    • https://gidafefutor.weebly.com/uploads/1/3/4/0/134040883/8cf2350.pdf
    • http://shop-kid-toys.online/the_new_gate_schnee_and_shinfmkbv.pdf
    • https://cdn-cms.f-static.net/uploads/4416787/normal_600e748377475.pdf
    • https://cdn-cms.f-static.net/uploads/4467003/normal_604baef6c7f2d.pdf
    • https://faxomozux.weebly.com/uploads/1/3/0/7/130775398/dofisamegukov_nixutawajitiw_gelafeke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fukepez/20427838801.pdf
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_225c011070194d2ca85c41d8c14efd8a.pdf?index=true
    • https://s3.amazonaws.com/bededuxotulapil/7311186893.pdf
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_dc503b77d4434c4e82562714c40bfe7c.pdf?index=true
    • https://1fae3a98-13b7-4b95-b1f0-1fbd1b7b0aee.filesusr.com/ugd/1da05d_269e0566cf504a178d1df213a3db821c.pdf?index=true
    • https://s3.amazonaws.com/nowonovege/21946922339.pdf
    • https://s3.amazonaws.com/pibajuwi/cute_cats_colouring_sheets.pdf
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_667544e51b404e16b52e542e16b8d937.pdf?index=true
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_522d304bd94c4b02b894784be6ed7832.pdf?index=true
    • https://s3.amazonaws.com/remuv/chambers_dictionary_of_synonyms_and_antonyms.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010274.bin
849d3ae94f4c282bc3bc8dcfc786ad67d29e0744b98a80fc1781e4d459898191
pdf-font-stream PDF embedded font (sfnt) at offset 0x10274 5580 bytes
font_01_sfnt_off0001158a.bin
a2db8519b9daec97a1598b0374123e17e63ac2d8d04eec30981cde49ba59291c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1158A 13248 bytes