Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9bae62faa552cb…

MALICIOUS

PDF

72.7 KB Created: 2020-12-19 17:07:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 601b33116afe807df7670d17ccd79033 SHA-1: 1de6edc60feb4504b2a73538fd6c75317a88f4d7 SHA-256: ea9bae62faa552cbacbf7eef637830b387c4514caffdd90c43e5b0c3ec3ddc14
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 0.9996

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=a+brief+introduction+to+fluid+mechanics+young+pdf PDF link annotation
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/9f2023486756.pdfIn PDF document text
    • https://judorobizud.weebly.com/uploads/1/3/4/4/134455398/1c08ddfeaef96f.pdfIn PDF document text
    • https://zijubanefim.weebly.com/uploads/1/3/4/3/134349059/9867670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470391/normal_5fbbf26169c5c.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/tuwibatajefu-zanudo.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/bd8fc662-7e12-492f-9aa3-e19f0c19a341/kanka_mouth_pain_liquid_target.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04cc0d9-f684-48fd-b6ed-40dbbf378cdc/nobopitanurazobeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1905173a-bf33-451b-9067-fe07318e9aee/middle_earth_shadow_of_mordor_achievement_guide_and_roadmap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0c160e0-75d1-4c37-98b5-dc30c1766b1c/95534930168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10bba73e-c401-4872-996d-b2eeb8664212/kagotogesiwexizasanakete.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fc4628e61e25426e1c464bf/1606705808075/botasunajurewejimolip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e12f44d-db26-43d5-bc6a-00a939627a87/47399016911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65713410-9929-45b4-9fd5-3359af744f92/vogue_madonna_lyrics_espaol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcecc30e554aa354113f3c5/t/5fd62db6313c42342b862b81/1607871927136/18160549703.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E0 2952 bytes
SHA-256: 013fc9f45313cdddd5762e6694753e55f6a85ad2eec225b6e17fd140af1ee5c7
font_01_sfnt_off0000d26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26F 5800 bytes
SHA-256: 60acc6b309fd973ecdc024b8208b527070161cdd8240da51974133332e6ae63d
font_02_sfnt_off0000e603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE603 2664 bytes
SHA-256: 0bd09448ec9ea43ad19e61c17a406a73f9ea586afbe0e0d605c91f73163e8be7
font_03_sfnt_off0000f17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17F 10440 bytes
SHA-256: 851f9280180c0523142987ae3db0c4399c0b9158ecaf5aa2317c7df8d44e3ade

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