Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35d86339502f7ad…

MALICIOUS

PDF

85.0 KB Created: 2020-12-23 14:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2aff32d8da9add067c0bf8098d8d1db3 SHA-1: 5aedef5948f5f86c8ea448780fd6ac735e6a68f0 SHA-256: d35d86339502f7ada9ced87e090aaea5c0baeeb33b43c9815f037087ea09cb21
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 a machine learning classifier, specifically flagging it as a redirector link and a link farm. The embedded URLs, such as https://traffking.ru/aws?utm_term=bates+motel+season+4, are likely used to direct users to phishing sites or download further malicious content. The presence of numerous external PDF links suggests an attempt to manipulate search engine rankings or distribute a large number of malicious documents.

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
  • 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://traffking.ru/aws?utm_term=bates+motel+season+4 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387807/normal_5fc30ec52e2c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501041/normal_5fbf5cb2f2e01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422386/normal_5f9fa64cce3bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463538/normal_5fca9ebd5292f.pdfIn PDF document text
    • https://judurufag.weebly.com/uploads/1/3/4/6/134688768/loxaxe-narowebi-lajokusewa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421342/normal_5fc4f958c5b2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414169/normal_5f9a10065c2c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/cetis_54_uniforme_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe9bb6bc-7480-4c76-b841-2dcac7fd6bce/koturazovoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/649f2eb8-ce08-4fb5-b5f1-0f628eff5335/an_introduction_to_numerical_analysis_suli.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/mcsa_complete_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0c027d-b09d-47ce-9840-494f0993a204/games_like_stickman_rpg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f12324b-a53b-4d5d-a359-519c29976c56/seleno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a9090b-7840-49dc-a47a-236266fe6efa/43207891147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe10c1c-5515-4ad6-b804-69c0452a0f7f/86612087988.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_off000109d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D1 4872 bytes
SHA-256: 04b5bd217c2286a6f7f0462bd813097fc80a8519e31f2325b196683d29bc4b2b
font_01_sfnt_off00011a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A56 13928 bytes
SHA-256: 3f33e89bea834b5cc282e31c71301f6a0f62f2ccee2bbf180524c19a2dda0001

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