Malicious PDF — malware analysis report

Static analysis result for SHA-256 11495d61756c5a59…

MALICIOUS

PDF

68.2 KB Created: 2021-02-22 20:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f6a3540ace035ae7c83b3a5fef5aad0b SHA-1: b40a28e0ae6bee46b18fd84b64770de981a3e3f8 SHA-256: 11495d61756c5a59fc587ba4f604cad6f626003c61316409af706d179fff4bba
244 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it's likely a phishing or malware distribution lure. It contains a large number of embedded URLs, many pointing to disposable hosting or redirectors, suggesting a link farm designed to direct users to malicious sites. The presence of a redirector URL further supports the malicious intent.

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
  • 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.
  • 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://crophysi.ru/strik?utm_term=vanguard+commercial+power+18+hp+oil+capacity In PDF document text
    • https://namonivet.weebly.com/uploads/1/3/4/4/134493383/mugarotudumoweso.pdfIn PDF document text
    • https://wisatevifo.weebly.com/uploads/1/3/0/7/130775851/3640032.pdfIn PDF document text
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/fipetefa-tijenike.pdfIn PDF document text
    • https://cdn.sqhk.co/bevibubos/e3ijnf2/jiwenepedile.pdfIn PDF document text
    • https://tepukijamuboze.weebly.com/uploads/1/3/5/3/135301813/5f066e5e7.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/Lhaghic/arcade1up_pac_man_40th_anniversary_arcade.pdfIn PDF document text
    • https://rixedevo.weebly.com/uploads/1/3/5/3/135306589/43c4f0.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/f7ee085eed0.pdfIn PDF document text
    • https://zeruxitewisav.weebly.com/uploads/1/3/1/8/131856065/7750273.pdfIn PDF document text
    • https://wokawopirajer.weebly.com/uploads/1/3/3/9/133999547/ribesekebas.pdfIn PDF document text
    • https://nodikakubal.weebly.com/uploads/1/3/5/9/135966501/0324a.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/Rhdgh2W/60256626297.pdfIn PDF document text
    • https://borubuzas.weebly.com/uploads/1/3/4/0/134042729/defosagiso_fufaxela_ribekevuvelow_mevanipinukewot.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/vapelurowar/najuw.pdfIn PDF document text
    • http://xasoxutek.epizy.com/nowozekexulalojorel.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/zusuzivugubikosazaxovugus.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA84 5712 bytes
SHA-256: d5cb8ea9fe8dac1c4d93c1b1e7f4010cfa8bb8c10181453300615171f3f6f9bf
font_01_sfnt_off0000ddf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF2 11084 bytes
SHA-256: e049ff6d10f9047bcff59506bc26d09017d69bf0396ae70781af67707066a5b1

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