Malicious PDF — malware analysis report

Static analysis result for SHA-256 6132f05e6bd4ce11…

MALICIOUS

PDF

73.4 KB Created: 2021-01-14 22:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 13dd3f14be689cb78d2832dc53df90cd SHA-1: f850249a8cae00f32198acea8e473e9d6c24fb9d SHA-256: 6132f05e6bd4ce1153c8b2003b5cb9c85afc7b3da39dc07e59dd9290ff712998
252 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including links to known malicious redirectors and a large number of external links hosted on disposable domains, suggesting a link farm designed to distribute malware. The presence of a 'download' button lure further supports a phishing or malware distribution attempt. ClamAV detection confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/wb?keyword=toca%20life%20city%20apk%201.%203%20free%20download In PDF document text
    • https://wojumujar.weebly.com/uploads/1/3/5/3/135396772/6560657.pdfIn PDF document text
    • https://tipirigemiwar.weebly.com/uploads/1/3/4/0/134016889/taxobarenobuminaxix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_5fbd0c174facd.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/eiisB6X/cooking_games_for_pc_online.pdfIn PDF document text
    • https://poperetaro.weebly.com/uploads/1/3/4/8/134893078/gupixege.pdfIn PDF document text
    • https://melubezu.weebly.com/uploads/1/3/4/3/134311229/9695287.pdfIn PDF document text
    • https://roturusuwanowus.weebly.com/uploads/1/3/4/3/134363773/4314627.pdfIn PDF document text
    • https://loropigofog.weebly.com/uploads/1/3/4/5/134595907/lujalobap.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/hegjc8a/fovexewid.pdfIn PDF document text
    • https://cdn.sqhk.co/wubofuse/VhcQWht/pro-_democracy_meaning_in_urdu.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/wefadep/kakelaraged.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/29727684686.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_off0000e050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE050 5424 bytes
SHA-256: ac23de338d736fa352bdadeb6f3679a56ddcd9448d5d9db6a09e566c57e246f0
font_01_sfnt_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 11232 bytes
SHA-256: 95cc38b312ae1a16d59de2ec07b02c9b192a35f6149d458942c0fcd0e31d5566

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