Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c77da069c8b3d3e…

MALICIOUS

PDF

78.3 KB Created: 2021-02-19 02:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 462b207b285d84dd98ee26b3acbdd344 SHA-1: 5387e83b6ce318a7fcfb4302b1439e54e819b3a9 SHA-256: 6c77da069c8b3d3e3a2523e69d5db8caf9051af3f0459a97b984d10a8397c01a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The embedded URL 'https://jacksth.ru/strik?utm_term=joseph+smith+jr+lectures+on+faith' and the document body mentioning 'Joseph smith jr lectures on faith' indicate a lure to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=joseph+smith+jr+lectures+on+faith PDF link annotation
    • http://keto-menu.online/18591978049iebnt.pdfIn PDF document text
    • https://gulurevipad.weebly.com/uploads/1/3/5/3/135349864/danegidasop-wivumipi-filejopon-zubale.pdfIn PDF document text
    • https://pigikitukapu.weebly.com/uploads/1/3/4/6/134693564/5269978.pdfIn PDF document text
    • https://zasuzepomuban.weebly.com/uploads/1/3/4/6/134627511/boxuk.pdfIn PDF document text
    • http://boxberry-24.cc/is_diastasis_recti_bad_during_pregnancypzv2q.pdfIn PDF document text
    • https://metuwudoguwo.weebly.com/uploads/1/3/5/3/135323448/d0cde632b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474223/normal_5fd3722c0540e.pdfIn PDF document text
    • http://goldstein.capital/fowokisedilovugizejez0eo1.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/dubukelepibev.pdfIn PDF document text
    • https://moxuzoketo.weebly.com/uploads/1/3/1/1/131164531/8517823.pdfIn PDF document text
    • https://luxufaxunixepu.weebly.com/uploads/1/3/4/5/134584211/2404416.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/wupagesazila.pdfIn PDF document text
    • https://lafadulow.weebly.com/uploads/1/3/4/5/134591129/tasun.pdfIn PDF document text
    • https://kukavijeri.weebly.com/uploads/1/3/3/9/133997324/e56cd0828a02d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_60290e42bfdca.pdfIn PDF document text
    • https://bezamefiparafu.weebly.com/uploads/1/3/4/6/134665790/xofobuwigarewi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/hubbards_marina_fishing_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/bitokanukebe.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/sql_server_2014_utorrent.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_off0000f21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21D 5320 bytes
SHA-256: 1f610f274dde926984934666becc032224ef9117ae286b5fd46e751ac770c798
font_01_sfnt_off0001040b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040B 12256 bytes
SHA-256: 129b2f535dc2a54c5e6d580cf398a649d154f0c01dc1b0e4efc0aa195f9a539b

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