Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff684a7216f6ee95…

MALICIOUS

PDF

64.5 KB Created: 2020-12-17 01:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7d1da346b543d038201d7b268d449303 SHA-1: 3f25873de1c7733ebf2f8a6a286eb8af77baef58 SHA-256: ff684a7216f6ee959b00ba1519ed179b2a68a99d966b8c32b9d97364dc5e7a0e
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a PDF link farm. The ML classifier also returned a high confidence score. The embedded URLs suggest an attempt to lure users to external sites, potentially for phishing or to download further malicious content. No scripts were extracted, but the presence of numerous links points to a content-driven attack.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=cub+scout+leader+name+tags In PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/noxezulozegu.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/lewilat-luzujinone-bimilovub-podav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dukajevo/video_project_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e771ff20-4f15-49d0-9354-f1034e0651cf/walmart_threats_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90c6a9d-60a4-4854-b48b-770eae9ac629/vavejanufejatad.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/donasukelagejafetefi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc296788787e8798976c150/t/5fc4839f1972c46e3c2dfe10/1606714272839/vepuzilul.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/riven_guide_s9.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/tuvidus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55c25693-13f4-48c6-80dc-8400e8263fe3/promaster_2500pk_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/digigitusuduk/danefilolido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3d48ede-4d19-438a-8790-ec40ef923f69/fijuxodoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/260c71dc-30c2-4b6b-8a72-a233f1df6fe1/25282473728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2badd49c-d28e-4147-9d60-ae783ab60e77/berkeley_suction_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c941059a-00d0-4040-b458-2c2cb938ad36/87117583585.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 2

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB110 5256 bytes
SHA-256: 6e4c4cdbd523ced4210f66c49c2afc4db3149225a68e14c74d41596581a89ca9
font_01_sfnt_off0000c2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C9 10044 bytes
SHA-256: 6df9b7ea574c9fe39d150cb674c96e5ae8364839319e1da82ca6cc0a3315842d
font_02_sfnt_off0000e52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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