Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfb1698732d49ab…

MALICIOUS

PDF

78.0 KB Created: 2021-02-23 01:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b7f5f93eb8f591edb1a96aac3aeea049 SHA-1: 7b4061c2d58150e677743c463a31ae6645c387f1 SHA-256: abfb1698732d49ab833aba8053f547b866d20de2c36b07371e0f992b3867346e
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 PDF files hosted on various domains, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate maliciousness. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support the conclusion that this document is designed to redirect users to potentially malicious sites, likely for credential harvesting or malware distribution.

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://jacksth.ru/strik?utm_term=hp+designjet+500+driver+download+windows+7+64+bit PDF link annotation
    • https://cdn.sqhk.co/duponetix/XXja2ib/tefalarizobirugizemadose.pdfIn PDF document text
    • https://magirakikepemun.weebly.com/uploads/1/3/4/0/134000039/3424453.pdfIn PDF document text
    • https://cdn.sqhk.co/mokabawimav/heJjjgh/45128233199.pdfIn PDF document text
    • https://junimadegerozo.weebly.com/uploads/1/3/4/0/134096607/bikajasunoderej.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/fujilekutulisagi.pdfIn PDF document text
    • https://rikinosi.weebly.com/uploads/1/3/4/3/134352476/soxonilajen.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/wR9hJji/nezigalamatu.pdfIn PDF document text
    • http://fusobilel.iblogger.org/96465466123.pdfIn PDF document text
    • http://trychambre.xyz/98635590166n7vke.pdfIn PDF document text
    • https://zirakamu.weebly.com/uploads/1/3/1/3/131398357/c0fa503a3.pdfIn PDF document text
    • http://kernig.pro/greatest_hits_radio_uk_app_free_online_downloaduiuo3.pdfIn PDF document text
    • https://cdn.sqhk.co/xipapotug/d8ieJgg/vutisaruze.pdfIn PDF document text
    • https://xadigepuve.weebly.com/uploads/1/3/1/4/131454317/pemavu-fejitufeponi-zoxunubebara.pdfIn PDF document text
    • http://tk-time.site/19333002607kb0q5.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/gedesisumi/1260749427.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/jitalameso.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/6820775976.pdfIn PDF document text
    • http://medipebep.rf.gd/59569561246.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/clipping_words_worksheet.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_off0000f11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11D 6044 bytes
SHA-256: d154a011d768aaa9619178a37df43d55d650bb19647f0547487eedde976fe1a7
font_01_sfnt_off000105de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DE 10808 bytes
SHA-256: e23a85cb6040002646a58fee0656f395866d755fa6d13f58a3a0fb6a422cbda6

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