Malicious PDF — malware analysis report

Static analysis result for SHA-256 04670641ce592e3c…

MALICIOUS

PDF

81.1 KB Created: 2020-12-24 03:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d561a5a6696115210b560e6f181cfd94 SHA-1: 7eb2c4650ad2dc0bbb48e84979436d15a94aab9f SHA-256: 04670641ce592e3cc8a4f12909b59c0d60855d240594b21673e27db764a33fe1
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, indicating it likely serves as a phishing lure. The embedded URLs and the PDF structure suggest it functions as a link farm, directing users to potentially malicious redirector infrastructure like 'ggtraff.ru'. No scripts were extracted, but the presence of numerous external links points towards an attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://ggtraff.ru/123?utm_term=antenna+tv+guide+columbus+ga+31904 In PDF document text
    • https://cdn.sqhk.co/jesisuvov/hbgje5Q/shooter_jennings_song_in_walk_the_line.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484631/normal_5fb36d2ad7e79.pdfIn PDF document text
    • https://moxolodoxezem.weebly.com/uploads/1/3/4/6/134678964/zarepukowexob-kidedatepubop-xoluvun-vowogumonap.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/Nhbgdgg/siliwotogir.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://uploads.strikinglycdn.com/files/0d76a042-554b-4c0d-8496-2767f0061952/sample_lesson_plan_evaluation_comments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb32ca84-1e22-4833-a6d1-af6d21d90748/nagatugodadepozor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88ee0cc9-10c2-425e-a178-810f54e201b6/roblox_groups_with_funds_no_owner_finder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5254fa93-67db-45d4-ba69-c51ae1f8271d/fazomuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bbbdc90-43d1-4120-9589-bd5435f7ba05/padirivif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39dad5e-6065-4a71-986a-7b2b4650019e/body_checked_egg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7523387-cc6a-4143-b8c5-5a83357e9fe8/east_meck_high_school_staff.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F8 11344 bytes
SHA-256: a42fc85e80062446941726ac493f79039e60a6020aa0149a98cde74cde2283ea
font_01_sfnt_off0000eecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECC 5836 bytes
SHA-256: 68b5c9d3dd3fd9e40438f53b43c58aa9a477332858c205b3c2ac94325b5f2306
font_02_sfnt_off0001029d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029D 11472 bytes
SHA-256: 46099dc68561b078e8a1afedfee33d2616950240e0c67d3528a45d77a741589e
font_03_sfnt_off00012927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12927 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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