Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d48c21a6e9dc8a…

MALICIOUS

PDF

82.0 KB Created: 2020-12-22 17:05:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 86a46285e220530aa7ec6320acb5d4fe SHA-1: ba007c83e85a8978f1663584769e800825dfcf2d SHA-256: b1d48c21a6e9dc8ac2eb92e5f98b90e803a3e9fe0a5e2075c6c50ae6ac1106b4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical finding for a PDF link farm and ClamAV detection as a phishing trojan. The embedded URLs and the PDF structure suggest an attempt to redirect users to malicious content or facilitate further compromise. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=spiderman+vs+venom+comic+vine PDF link annotation
    • https://ziwugedaxuz.weebly.com/uploads/1/3/4/5/134501511/6d5295421d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455207/normal_5fa49e0c52fcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421983/normal_5fc3c3f9301a5.pdfIn PDF document text
    • https://voganolov.weebly.com/uploads/1/3/4/3/134372868/9448cae6c6.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/bojafazes/baseba.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11355ab79f442f22aa123/t/5fc14d3b61e25426e16869b6/1606503739473/ares_online_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/asale_pilla_telugu_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/sesabutijalov.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/41518261729.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe12e3521f8730529b122b6/t/5fe13b2b25b657695472d525/1608596268895/chambray_les_tours_hotel_formule_1.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/jebudafa.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/active_listening_2_teacher_s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/5953372532.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_off000102fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FA 5352 bytes
SHA-256: c1ccf02a4380042105ed837c7b74567ebf797e3eb3d8955ad6f6f9298760f07b
font_01_sfnt_off0001151a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151A 11164 bytes
SHA-256: edc4776c78861c5acd2f6580a75bb88c668cf7317426913976282ac1eae64b78

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