Malicious PDF — malware analysis report

Static analysis result for SHA-256 5114fcfd4736d51e…

MALICIOUS

PDF

73.5 KB Created: 2021-03-16 17:22:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3d077158aded8a0eeefc350de6337056 SHA-1: a2a0d5e4fb09de49be77283141e6d75949f82da9 SHA-256: 5114fcfd4736d51e1de4b76d5e53196e6b933a987c8f07eca408ce698a65ef94
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links pointing to disposable domains and Weebly-hosted PDFs, indicating a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest potential for further malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=climatogram+of+savanna PDF link annotation
    • https://sazoxizifa.weebly.com/uploads/1/3/4/5/134505384/9fd37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496826/normal_60086aafb5067.pdfIn PDF document text
    • https://gomafaned.weebly.com/uploads/1/3/5/2/135296522/rumidi-tukakomiwe-fojut-pefosamomefujen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494668/normal_600790a68637b.pdfIn PDF document text
    • https://fujuzelos.weebly.com/uploads/1/3/1/3/131380065/gawoni_dejuga.pdfIn PDF document text
    • https://cdn.sqhk.co/redusebi/V4hgjgm/35383052258.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/go2rifI/lightroom_6_vs_lightroom_classic_cc.pdfIn PDF document text
    • https://cdn.sqhk.co/bimeniwog/gj6jdDP/justin_bieber_friends_letra_espanol.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/zozisarizunewoxolulokasow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_5fd381ae14a9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486206/normal_5feb30210243c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458137/normal_601e7da97721c.pdfIn PDF document text
    • https://xanalefude.weebly.com/uploads/1/3/1/4/131411596/2347381.pdfIn PDF document text
    • https://cdn.sqhk.co/kitatoze/iiaDMgj/modiwisoda.pdfIn PDF document text
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/wokoduzelije-vowogufagozova.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/mewewipuvugonixezukakur.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/3igJpIC/legudopakoxibawe.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/sotirixesiso-zilubikoririk.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/acWjhVv/galonavusifopipi.pdfIn PDF document text
    • https://cdn.sqhk.co/valibekarofu/bJLnhgY/23142713422.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xipanizi.myartsonline.com/fojetu.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_off0000e39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39C 5052 bytes
SHA-256: d9631d882fb5fe485c2fa843806b867b649739b372441bda90d27fb4a5a7f165
font_01_sfnt_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 10684 bytes
SHA-256: 6946ae23987228d84bc69a6fd43befb34dffe76cf15c4e96b789e64c25f5ab20