Malicious PDF — malware analysis report

Static analysis result for SHA-256 011fdf89c7f1a42b…

MALICIOUS

PDF

67.5 KB Created: 2020-11-11 14:57:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a3c7e9964fdce4a462f1b85515195346 SHA-1: de0aafb88177007dc7d0852823932e29d3a63906 SHA-256: 011fdf89c7f1a42bd76e5f21f247891928e4651cbe8a4b70e8bcb8c86a4016db
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafficel.ru/strik?utm_term=yelp+reviews+on+vivid+seats PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5f8ae73e9bd00.pdfIn PDF document text
    • https://menekagamop.weebly.com/uploads/1/3/4/0/134097565/jezofoxepasu.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/mozirolinitaje/78671316003.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/world_of_final_fantasy_guide_download.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/solulokapipiwifu.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/21165611480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de045e0-082a-437a-980a-4d219d68afa9/bond_order_no.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/blood_circulation_in_the_heart.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/jay_z_the_blueprint_rar.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/8942137142.pdfIn PDF document text
    • https://s3.amazonaws.com/welutizenop/pathfinder_player_advancement.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/gasajegorevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/165fc5ad-d1a6-44fe-b684-c5919c8ae5b4/zituxamobov.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/80605925791.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_off0000cb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB73 5068 bytes
SHA-256: aca3583b6a142536218c8154021b6ea370cc4eecc1ffc87b2bcbb6e636dd58d6
font_01_sfnt_off0000dcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD1 10724 bytes
SHA-256: 8f8e406199daf4bbb4fd1a6badb297d1fa92fd66d066754caad35c9cbba108fe

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