Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d76022c8ac773a1…

MALICIOUS

PDF

61.3 KB Created: 2020-11-13 12:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 37201675ecb9531e7ceea82c7870f19a SHA-1: 1672c853fdd875057828e3e255e589064a8407b6 SHA-256: 5d76022c8ac773a1ec88bd12b0eb0bd9ade040843103ffde59edc3abd7e20ea7
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://trafftec.ru/strik?utm_term=metodologia+del+trabajo+social+ezequ PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403128/normal_5fa9d5771c2e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_5fa1961c4c852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_5f92336979000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f892b0e1e537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476015/normal_5fad8ffeef783.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/tiwezoda_letagusarifofeg_difotunujaduni_nazakotilimena.pdfIn PDF document text
    • https://xororowikaluna.weebly.com/uploads/1/3/4/6/134643421/5715356.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/23165649-4629-463e-9155-0cbfff199c74/samsung_steam_aquajet_vrt_washer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/437748ee-0d8b-4d8e-902b-6907f6808772/design_thinking_process_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30cfac2c-7f88-4f3a-9a66-0cb3f06eaa37/tekowoniwexakirixolisod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00797048-4175-4300-ad84-1e3b271e8134/43609716851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b4c5b71-a94f-459a-abe9-871b87ead396/rcbs_green_machine_reloading_press.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b7762a-5583-44d2-a6f4-7666f9051e24/3410273212.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/5553255405.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_off0000b08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB08E 5504 bytes
SHA-256: e9f49683f0b81945f66c895506ce4df291c50761a11305bd7b7ecf1a9487b1a0
font_01_sfnt_off0000c366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC366 10848 bytes
SHA-256: 888ef32c7a60f6a0d5a3f09821777992a71c0a062816b72448f473ca13626f5c

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