Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a19321ccc7aa945…

MALICIOUS

PDF

73.7 KB Created: 2021-01-02 11:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c8af004f2825f87e81953cca3a81ea46 SHA-1: 768cb3e592bbcde2365be348e9b765ef53beefaa SHA-256: 7a19321ccc7aa945aad7c871230a0be471b60c18369f708192e740881c691430
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' indicating a large number of outbound links. The primary URL, 'https://traffset.ru/aws?utm_term=partnership+deed+agreement+format+india', suggests a phishing or redirection attempt. ClamAV detection and ML classification further support its malicious nature, likely as a phishing document designed to lead users to malicious sites.

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://traffset.ru/aws?utm_term=partnership+deed+agreement+format+india PDF link annotation
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/natalepapozidowu.pdfIn PDF document text
    • https://misopiwulasi.weebly.com/uploads/1/3/1/8/131856666/limem-mulirekop-gomab-lafibid.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/jibez-bomuwusowaka.pdfIn PDF document text
    • https://pipalilivo.weebly.com/uploads/1/3/4/3/134310902/6ea7002dadd7a0.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/6jaijgc/ball_jump_on_stack_helix_balloons.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/vufaxipeximugibukas.pdfIn PDF document text
    • https://xegiwisupanax.weebly.com/uploads/1/3/4/3/134367095/xawevadal-wabato-vigujosav-kasatebupi.pdfIn PDF document text
    • https://gixoxiri.weebly.com/uploads/1/3/4/7/134707295/xajumumajoka_ripun_datanus.pdfIn PDF document text
    • https://jazaxalik.weebly.com/uploads/1/3/4/4/134488577/8548402.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/tinajabizoreguf/11699637995.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/26709171367.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/modelones_polygel_nail_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/46034898791.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_off0000e139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE139 5424 bytes
SHA-256: 45ea3399a616a1d1eb970d4416bc7d48179836f5531055999ec158d25c4d7921
font_01_sfnt_off0000f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 10880 bytes
SHA-256: 644f6adb94fc1bf9aef9401656e875b695d35e78bdaad0df61b5ce7430719495

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