Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d408b69aed17a3…

MALICIOUS

PDF

123.2 KB Created: 2020-11-27 09:48:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 468d8dedd07110627633880d7fa0abd4 SHA-1: d1342b7dec4b28519568e4e6bf2ff110ff607f32 SHA-256: 11d408b69aed17a3e54467ff64fdd0c4399e7d785b799ce1accc11eb0b74cdd6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://traffnew.ru/aws?utm_term=bhojpuri+birha+audio+free PDF link annotation
    • https://tumegifokax.weebly.com/uploads/1/3/4/2/134235775/rowifete_kobubamutuben_sakitojobenufer_kopozona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413983/normal_5fbd80e2782c7.pdfIn PDF document text
    • https://kotidirexi.weebly.com/uploads/1/3/4/3/134358756/1ea8e127.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/5449688.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/5445953.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/denesanijibep.pdfIn PDF document text
    • https://zurareren.weebly.com/uploads/1/3/4/5/134583426/2495192.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/xopevu_vilugarokobijos_fimorekon.pdfIn PDF document text
    • https://purusoze.weebly.com/uploads/1/3/4/4/134495244/a3d62.pdfIn PDF document text
    • https://guvodirafed.weebly.com/uploads/1/3/4/4/134475496/8adb28eecda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b385ef6b-74e2-42d1-a678-8281fe804ff2/words_that_start_with_acea.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/sinusitis_guidelines_antibiotics.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/sixopivuworokalowijesu.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/bachna_ae_haseeno_moviescounter.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/age_of_exploration_crossword_review_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3a07c38-67c0-4d04-a87f-302ee252da22/tovubujorutu.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_off0001a842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A842 5184 bytes
SHA-256: 1680e1a89822340b67f297c1b1ab86b4e386611eccf415c3d8bdd30aab20e352
font_01_sfnt_off0001b9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9E2 11656 bytes
SHA-256: 06cf7efb5c436880f873537b8ae87d6885aea834ec03fa1682b1656a9b6f4ae3

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