Malicious PDF — malware analysis report

Static analysis result for SHA-256 370296ce484362c0…

MALICIOUS

PDF

90.1 KB Created: 2021-03-12 08:17:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 32b807c2582ae6b113e515a870aeeb17 SHA-1: b6b255d1611dcc579c3aee678a5bb36faff0f881 SHA-256: 370296ce484362c001380d556d63494c2d2dbf1f54640c4282f353af6de7d2db
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 0.9989

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://pelibifir.ru/award?keyword=astrology+planets+in+houses+pdf PDF link annotation
    • http://zafufevede.iblogger.org/11335430614.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467285/normal_5fcd0a8eb81c4.pdfIn PDF document text
    • http://tinonijo.iblogger.org/24708194718.pdfIn PDF document text
    • https://jutokikifugata.weebly.com/uploads/1/3/1/0/131070124/xulefumesur_fevufule_digifewe_woxili.pdfIn PDF document text
    • http://votofeveta.iblogger.org/81035531568.pdfIn PDF document text
    • https://retizobokeli.weebly.com/uploads/1/3/1/0/131070240/8142605.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501041/normal_5fef65fe12261.pdfIn PDF document text
    • https://virigegeke.weebly.com/uploads/1/3/2/7/132740897/7277236.pdfIn PDF document text
    • https://togoxijagujeg.weebly.com/uploads/1/3/0/7/130775712/dekuguzo.pdfIn PDF document text
    • https://vidiwubiref.weebly.com/uploads/1/3/0/8/130874646/63405.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474211/normal_5fefc2ad3627a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463279/normal_5fed9ec639f4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_5fc9ddfa2d4db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_e391ad48a8ad43338b42ea9e4d5ff7fc.pdf?index=trueIn PDF document text
    • http://fulawumobolofog.epizy.com/rounders_imdb_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e15765-c9cf-43ba-903d-9fffaeed7761/zemugu.pdfIn PDF document text
    • http://dawutanarav.epizy.com/jukifefimabo.pdfIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_d6e81326f7364f21a21def6d6c4c35da.pdf?index=trueIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_513e51822a544cccb94363acf8d36a62.pdf?index=trueIn PDF document text
    • http://doxewadafexe.rf.gd/android_9_update_free.pdfIn PDF document text
    • http://bibuligo.epizy.com/pilenopulojelaka.pdfIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_b039089666e24350a2d65aedfaee7fc9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cfce534-7d9d-459d-8a3e-572a66bb30c3/93465902249.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B9 5396 bytes
SHA-256: 271b1f75ee3fb1806325e039faebe9795c1c8d35b4adfa3de1a8ca8d53cf7719
font_01_sfnt_off00011c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C13 10652 bytes
SHA-256: b7f5c6bc60923417b452cfad7dd7f84d5c3dfa52bcac5c651a647759aa047681
font_02_sfnt_off000140a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A1 17284 bytes
SHA-256: 6ab397b2fa0a32272ad044a3b60f5d38057cd83b9351fefaf5d8b47b6ada990a