Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a73815ed0a76858…

MALICIOUS

PDF

62.8 KB Created: 2020-11-28 05:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f96a0d8e55fbee3290a284df978f4d2c SHA-1: d735006e61d7d18849960a35a2636a862612653a SHA-256: 7a73815ed0a768581def98287c58c44eb11ba55bfb1e18f4b1e83a328641a54d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/strik?utm_term=mitsubishi+electric+mr+slim+user+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5fad81e884e89.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/e0d3d27f64f48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_5f96f8d166620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460682/normal_5fb2baa11dd06.pdfIn PDF document text
    • https://pewepexit.weebly.com/uploads/1/3/4/6/134659954/bawupam-zojerupusifewil-pevapimetovuk-nokefopi.pdfIn PDF document text
    • https://feresaxeto.weebly.com/uploads/1/3/4/6/134609658/rujove.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/6e1185a7-1ff9-4c86-8c34-028dff53dadb/zuwopubumez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c726c8a1-7e43-48e8-ad7e-c6bbca53a479/44117377268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbac2f76-5af6-46ab-955d-718d898896c5/podixajagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0186035c-fc09-46b2-9c4c-d085d7512373/bejajap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74dbfa02-1d66-4348-ab44-cb54e084bd87/birujunumor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/827cb77e-b99a-4195-8c86-22a4635368b6/tamezozumerufowo.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_off0000b7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D6 5184 bytes
SHA-256: a248557ba80b0b2b70678c7d9cf0d499eefe0ac396d0c0adff16b870b16ea3d1
font_01_sfnt_off0000c954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC954 10296 bytes
SHA-256: 36900403df89351a80394df4dd6ad4da1e9ce248427513431e69d854bfb54abd

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