Malicious PDF — malware analysis report

Static analysis result for SHA-256 e869f001e285c8a0…

MALICIOUS

PDF

85.7 KB Created: 2020-12-22 16:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f018b3a4f47ce294e3e622296ff029cb SHA-1: 51a431783df99a5ffeec13991fa6c115c0585ebf SHA-256: e869f001e285c8a0b0af81e57cc31cef3bdae7e7b3e23c4699e0f895a4c5acb0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'trafftec.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are characteristic of a lure to a malicious site, likely for initial access via spearphishing.

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
  • 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/123?utm_term=poe+sextant+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489988/normal_5fc6286929243.pdfIn PDF document text
    • https://watuwejaxor.weebly.com/uploads/1/3/4/4/134437052/vapedegaji-ridumovo-segenudavobik-devigiri.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/fuwawibu/11401751397.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfdbf19d00c472c28c2758/t/5fe04bc91c66f52f5fb7df7d/1608534986620/jumbled_sentences_worksheet_for_grade_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa2f2034-8f47-45a7-8b49-c48e34f64930/51555396349.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd5508eb685147a09c9c9e/t/5fdda4b4ef8e407a9e7f9b22/1608361140672/content_strategy_a_guide_for_ux_designers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a26e977-b530-404e-994b-965523b85251/97557875702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1778aa5-a0c2-40b9-b296-1a8e6d48ca6a/zisobigunitodujixusi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a0fd5e8e827d42ae1459/t/5fcbb2ae551bdc47e7ae1444/1607185075251/rush_ball_dancers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5590abeb-f6f2-4ad8-b546-47a49a799c9f/75580528019.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_off000114ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AB 4932 bytes
SHA-256: cb31b44a6a08b54a3abb52d81f1ad9316a0e59613eb2883e007000297212d43c
font_01_sfnt_off0001258f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258F 10912 bytes
SHA-256: 3884fde7ad2a7bf773cfc8f8341f31c40ac8d6d641650c292f33e7f3d568b52a

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