Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad8f2a8cef1a4e7…

MALICIOUS

PDF

74.8 KB Created: 2021-03-10 08:34:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: dadb389fa514a97f46f70cbb4c7fddee SHA-1: 289a197d91a460b72ce682e310f60745483ae9fa SHA-256: 4ad8f2a8cef1a4e778b4161ca6ca3782cf121bf8796dc1bc176836a67642cd8b
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing. The heuristic PDF_SEO_LINK_FARM and the presence of a suspicious URL strongly suggest a phishing or malicious redirection attempt. The ML classifier and ClamAV detection further support the malicious nature of this PDF, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/strik?utm_term=divergent+full+movie+free+no+download+or+sign+up PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444882/normal_5fddb1dfd88f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476285/normal_5fc733bb4ddd4.pdfIn PDF document text
    • http://bellissimo.online/waifu_wars_commands2tp8t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_600acab91dcdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420039/normal_5ffd65173aefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_6040bebd33e12.pdfIn PDF document text
    • http://mon-cmbretagne.com/how_to_setup_turtle_beach_px4_on_ps4if5ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476002/normal_603f439fe355e.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/Dkjhjfn/criminal_case_2_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388062/normal_5fec8f4343adc.pdfIn PDF document text
    • https://cdn.sqhk.co/ginudaket/gfjahgy/poxerebogonasidugamajow.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuniruf/jdlhjVK/rijanasidasikoto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392451/normal_5ffc2ace113a4.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/jhhgpjc/bewil.pdfIn PDF document text
    • http://usacreditscore.info/11236994305upxbs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_19c8a485dffd488ebb40de1f870c78ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ca1800-f4c1-4db7-a77a-3e80c289617f/hague_watermax_water_softener_price.pdfIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_02349b0df5834ac78ad9ae04580eb66e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a44eb2-5c02-45f5-9050-82ea78956a69/berkeley_review_mcat_biology.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_off0000e815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 5512 bytes
SHA-256: 84f7505f5bff4dad9d9bf814742e51ee66c7cc6f85f16c995154e44c555ca196
font_01_sfnt_off0000fad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD9 10268 bytes
SHA-256: 0f431fe637e8339622004c70ce82c7f7b635fef9f76a10f6f3537994d9257222

Open this report in the interactive analyzer, or submit your own file for analysis.