Malicious PDF — malware analysis report

Static analysis result for SHA-256 e24cca5abed6c797…

MALICIOUS

PDF

40.9 KB Created: 2020-11-06 14:38:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ec687865307d942df4e8bacc0a048d6a SHA-1: e4cfc0a08af0a671829ee05a20e93ecb76fc38ff SHA-256: e24cca5abed6c797b7ae23e420f9cd1b3f1d265b81a4bbe44ba983ba155607ca
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs, including one pointing to 'traffnew.ru', which is flagged as a potential malicious link farm. The document body, though heavily obfuscated, contains text related to 'auto repair manuals download' and the malicious URL, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/aws?keyword=auto+repair+manuals+download PDF link annotation
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/zuvuzixusemawetesemu.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/zefozupekugejafepabu.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/5494272.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/5003d5cbc57e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f985d999cda8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f894acc8be73.pdfIn PDF document text
    • https://dobekaveliwe.weebly.com/uploads/1/3/4/5/134599348/nododogofida-zugazojep.pdfIn PDF document text
    • https://rugaxiloved.weebly.com/uploads/1/3/4/3/134305568/3a3d1.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.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/vexosafugunu/algebra_connections_chapter_8_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/revoponatokiwopuxodujoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c6d8a2-1ead-4ae8-af18-0ee6cd132151/independent_events_probability_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5185/0165/files/20406344301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b059cd7a-1580-4145-9359-66233c5d0216/digimon_world_evolve_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/nisekinagilumisurat.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/fiseda.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_off00005e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E48 5188 bytes
SHA-256: 35512c53cc92a3d13c426bf9ed914cab71a933d4a51412ffa9ce8fc2404f16ed
font_01_sfnt_off00006fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE3 11480 bytes
SHA-256: 952a02ba7553e1b0cf651af3470f495b05977b14564e37598b33bc400aa95936

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