Malicious PDF — malware analysis report

Static analysis result for SHA-256 505590704bef0888…

MALICIOUS

PDF

68.4 KB Created: 2020-12-01 14:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 07fc2eeddc7dd915af60e1f215a44785 SHA-1: dee471a25564ef30615b265e50dd849f09df9448 SHA-256: 505590704bef0888cb0cc37c48fe7c4462ddc4f9aab887747b9e63e2afc37312
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffe.ru/strik?utm_term=samsung+60+inch+smart+tv+1080p PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449184/normal_5fa2272c243b4.pdfIn PDF document text
    • https://vomujozirokino.weebly.com/uploads/1/3/4/3/134318601/6cb1f8666.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/rimejiguvif/65833129413.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/57776781467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11cf7fb3-dcef-43c7-a76d-aae7012a30c2/pusukoguger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b2cafe4-f4b6-4b61-ab2e-ee2e0ec77d74/goxiziwobawemozuloboraxiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1efbe7c0-e19f-427e-a6c1-1fa8f38560b2/dell_inspiron_17_5000_series_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c562c137-4dcb-4fb6-aa78-4f9d837e458c/25515748017.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed1560f2895dc1e7fe11/t/5fc27583173fb5383bf26be8/1606579587747/83984107353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dcdf2b4-7c35-4e67-80b7-175ce5fc94d4/vebiwifebodexevad.pdfIn PDF document text
    • https://s3.amazonaws.com/digigitusuduk/funny_toilet_paper_holder_monkey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8049def-fad5-497a-905a-0d40d63ce685/12482392034.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/88318229503.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed012e537a05ef0936a0/t/5fc4038761e25426e1b4ae57/1606681479588/48646455690.pdfIn PDF document text
    • https://s3.amazonaws.com/sirasu/jokem.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8D 6020 bytes
SHA-256: 06aa7bc7808044924f3b25c49e7c9510f614c3d3ec2f3c824b39084e5ae12957
font_01_sfnt_off0000e0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 10436 bytes
SHA-256: ee99516f1a33b709feb87cb1bba6bfd6e1587a4d4091336d80aba62217590263

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