Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3f16bd4b561760…

MALICIOUS

PDF

70.3 KB Created: 2021-02-26 20:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4c46fa3faed78a54f6efcedc194b7239 SHA-1: 4c4ef7d6a23cf980064877660f6afccfa2dc07b2 SHA-256: df3f16bd4b561760b4376e35db1ee57399b7063edc0e37b0750a947ef093eeba
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://lozipotod.ru/strik?utm_term=2003+saturn+l200+repair+manual PDF link annotation
    • https://werotibumef.weebly.com/uploads/1/3/4/9/134900185/fb94784d386.pdfIn PDF document text
    • https://weduparazibad.weebly.com/uploads/1/3/4/7/134710999/gogilijigigijef-bivobelodepofe-firoduwaw-zodilulilisuv.pdfIn PDF document text
    • https://mozipode.weebly.com/uploads/1/3/1/4/131437967/fafevimoxotul.pdfIn PDF document text
    • https://cdn.sqhk.co/fezifoxunif/tPtzghw/private_notepad_pro_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492575/normal_5fce5ea0d9caa.pdfIn PDF document text
    • https://cdn.sqhk.co/disanefamu/HjifjdU/45947411354.pdfIn PDF document text
    • http://1pokypki.website/69177196377e3hnx.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/tunenijexe/tepajetivemomiluwevaku.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/cursive_penmanship_worksheets_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/kisitinozetas.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/b._o._d_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/covering_letter_format_for_visa.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/tososudedida.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/java_with_selenium_for_testers.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_off0000d5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EA 5308 bytes
SHA-256: 06180245842ab2ac481668b79e451b415d4c2d87dff2f48c153e42effe509159
font_01_sfnt_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 10636 bytes
SHA-256: ed59c465d7d35875c6b0baee55c1bf35196d12640e1d8464f1cf28a8feb1035b

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