Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a07b157532bd429…

MALICIOUS

PDF

80.8 KB Created: 2021-03-19 17:31:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fb58d24b95f84fa4ea1c42df6acdf9b2 SHA-1: a11d8aa087f2005139b029ca9684995ba23fba47 SHA-256: 1a07b157532bd4295e88a09574c7afbe3aadc56cb6cfc2a60b1810379e26b3de
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing, directing users to websites that may host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=eat+right+4+your+blood+type+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365546/normal_5fffd049a6864.pdfIn PDF document text
    • https://menesifewo.weebly.com/uploads/1/3/0/8/130814293/1f03face5434.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484122/normal_5fe1a3c463e69.pdfIn PDF document text
    • https://cdn.sqhk.co/sofilita/PjaiioD/33901300137.pdfIn PDF document text
    • https://takadoturig.weebly.com/uploads/1/3/4/1/134108809/gatidovanupikiwax.pdfIn PDF document text
    • https://kuburabet.weebly.com/uploads/1/3/4/3/134362545/pedamidusuked.pdfIn PDF document text
    • https://babejogoj.weebly.com/uploads/1/3/1/8/131856270/fogij-kigatokiz-kukufu.pdfIn PDF document text
    • https://cdn.sqhk.co/naxusepimosa/bXSz4gi/40853036244.pdfIn PDF document text
    • https://gojesewemuvi.weebly.com/uploads/1/3/2/6/132681304/games_wademu.pdfIn PDF document text
    • https://redirusoko.weebly.com/uploads/1/3/4/7/134704710/8027197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_6021bb7fb9393.pdfIn PDF document text
    • https://vezaruve.weebly.com/uploads/1/3/1/3/131378950/dizivobudixu.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/fulosobezur/percy_jackson_book_1_word_count.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/fountas_and_pinnell_guided_reading.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/hunter_douglas_group_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/59742517307.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/lifuxegorubinipivogoma.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/greek_mythology_names_female_goddesses.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/thesis_interim_report_example.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_off0000fea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA2 5412 bytes
SHA-256: 1de2360370cb947ea87c0ceaebe02b6b209456be8cc0938f574347e35499e630
font_01_sfnt_off00011113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11113 10816 bytes
SHA-256: ac3792833365271ac0438a7563f4038a2ba9c6bc4e0d309316993b36b4727c18

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