Malicious PDF — malware analysis report

Static analysis result for SHA-256 10eaf46063667fa8…

MALICIOUS

PDF

78.7 KB Created: 2021-06-07 19:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 624e52b619cc0a9c6de8ffea188c0a26 SHA-1: c0f6018affa2222aefc126ead3df3c58518185e4 SHA-256: 10eaf46063667fa89a957637531cb307d528baaa681dfb82f006a80fe476350d
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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.
  • 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://ponafet.ru/123?utm_term=w.+b.+c.+s+form+fill+up PDF link annotation
    • https://fepobewute.weebly.com/uploads/1/3/5/3/135386667/tikafu.pdfIn PDF document text
    • https://nulebuset.weebly.com/uploads/1/3/1/4/131411431/fujosozosibes-nigaze-xujage.pdfIn PDF document text
    • https://ravixolagawiji.weebly.com/uploads/1/3/4/4/134491843/d2a3c41dc.pdfIn PDF document text
    • https://kerijifulonuf.weebly.com/uploads/1/3/5/3/135328136/d8969.pdfIn PDF document text
    • https://lujotasapamuxa.weebly.com/uploads/1/3/0/9/130969194/popoxin_rogezajev_vukajujopi_tinevexa.pdfIn PDF document text
    • https://nudomituge.weebly.com/uploads/1/3/4/6/134677479/4868053.pdfIn PDF document text
    • https://sunanineriputa.weebly.com/uploads/1/3/2/7/132740954/94e67568.pdfIn PDF document text
    • https://gojamomajaso.weebly.com/uploads/1/3/4/6/134616238/figotipini.pdfIn PDF document text
    • https://besajiti.weebly.com/uploads/1/3/1/8/131856076/7938573.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cb0bca02-e611-44e3-bf6a-2402141a8c86/how_do_i_find_my_fios_username_and_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe9c9693-94b8-4b96-bf11-4ca153da9534/vukajuwisozimodanirobim.pdfIn PDF document text
    • http://detomipipu.pbworks.com/f/what_is_the_obstruction_rule_in_softball.pdfIn PDF document text
    • http://fuxedemama.pbworks.com/w/file/fetch/144516966/complemento_directo_e_indirecto_en_frances.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1050e4a-a130-4466-8136-6c56e123e05b/will_be_going_to_present_continuous_exercises_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/402cbad6-4149-4b85-abf3-ea6c364f3a7a/timex_expedition_chronograph_battery.pdfIn PDF document text
    • http://gatunam.pbworks.com/w/file/fetch/144680946/34835659189.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144427476/calendario_lunar_para_siembra_2020_colombia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783c79e2-e1c7-4ae9-8ad9-90901122b55b/79132451375.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/f/81506008981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40022fe2-75a6-4434-bccb-c7aab0f94e5f/zarup.pdfIn PDF document text
    • http://ririgifavem.pbworks.com/w/file/fetch/144644592/79932726689.pdfIn PDF document text
    • http://kolelulu.pbworks.com/w/file/fetch/144621102/wuvizefulase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a30841b-6854-4ef9-8ce7-0f44c2c1bace/bezuxudofomozozudovugefod.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/f/19343353462.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 4712 bytes
SHA-256: c51b42fef811b73c9a79cb467d989a8377fb575d4fdadea39ae1ab7ffa50b61e
font_01_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 10472 bytes
SHA-256: 037746047d22e05629e3a0cb3f5c259d1c40bac9f423053ba9c7c9334e10d235
font_02_sfnt_off00011edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDD 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c