Malicious PDF — malware analysis report

Static analysis result for SHA-256 a35ee31eab561f41…

MALICIOUS

PDF

79.7 KB Created: 2020-12-06 16:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6b2614e2c36ab04119109e67dbe1af91 SHA-1: 936075976b04a2738691afe0861e74b2017154c3 SHA-256: a35ee31eab561f4172aac2b9d4e99048c38c06e947c1d0fef6699f183cd57990
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://traffnew.ru/aws?utm_term=tv+guide+perth+wa+sunday PDF link annotation
    • https://pafazemewo.weebly.com/uploads/1/3/4/5/134517711/af0f1e6f5bd1.pdfIn PDF document text
    • https://puvugaluruwibok.weebly.com/uploads/1/3/4/4/134445294/2951159.pdfIn PDF document text
    • https://zexiditituluw.weebly.com/uploads/1/3/4/7/134734655/vudizuvebibadewemo.pdfIn PDF document text
    • https://siwinapevaz.weebly.com/uploads/1/3/4/3/134338690/5164262.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://s3.amazonaws.com/tetenifeme/10610559167.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/world_war_z_best_class_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/file_apk_appvn.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/96122947983.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f926a879396864223f82/t/5fc8379f46ef2e08cbad8422/1606956960197/colorsnap_visualizer_how_it_works.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec335fe8-9016-4a92-8b3b-c8f541e6fafa/next_to_normal_monologue.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/arithmetic_and_geometric_sequences_word_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/windows_10_enterprise_build_1803.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/pokemon_ancient_origins_card_list.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 5164 bytes
SHA-256: a8d92aee00049cbca17139bff4c4775ce511eeb4f0672f01b928cbb7c9e95e27
font_01_sfnt_off0000f9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 13288 bytes
SHA-256: 40c07bf9c7f1efeb814b8497c74eb5669052651fb1184840ea0aa9460e3d8b2e
font_02_sfnt_off00012446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12446 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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