Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ffc076578205a4…

MALICIOUS

PDF

70.0 KB Created: 2020-11-11 08:57:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8420f87386b6f6c59201a23232f4d5b0 SHA-1: d2fd458dea36dc21208e5100c1fa837737b896ce SHA-256: b0ffc076578205a4c3c46c82c47327331eb2c5f881252d8c3544374fd794b181
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 0.9997

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://traffnew.ru/strik?keyword=congressional+redistricting+worksheet PDF link annotation
    • https://pafirolexorawu.weebly.com/uploads/1/3/4/6/134612045/b7574b5.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/zegeguritewido.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/0e5f651f-b8ad-4233-9ade-2b7cd17e2e6c/vazexixaribasopor.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/kunefavezoramegajiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/defective_muscle_coordination_term.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/73222740487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f13b49-c3b2-4f31-a84c-118944506880/torrent_download_adobe_photoshop_with_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0acae488-4f25-43ef-9125-81fe5f52b107/how_do_you_delete_your_zoosk_account.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/mewewawilajatafi.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/walter_de_la_mare_biography.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/watch_birds_of_prey_online_free_put.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0659c1aa-2204-4534-ba28-d7f9856d9ac8/fifa_19_realistic_sliders.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 5260 bytes
SHA-256: 37efa3bc5dea4992a0e9c22ec8c41a96e909fc60353939d0f5e4d658d8086f6c
font_01_sfnt_off0000e8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CA 9988 bytes
SHA-256: 8427983b9c805a4e05e2d7fabaf0a534af3e6d0a42396ce73e84a7b45cfa07d5

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