Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c55d3ba188865f…

MALICIOUS

PDF

85.4 KB Created: 2021-03-17 00:31:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 3d86128e3cbbe3d5d49532f761c4b1f0 SHA-1: 318e15f5fdca3dc9555997b4f302fa1e49f7d9d8 SHA-256: 97c55d3ba188865fb29cd0b059f7ef70b11a07a185ea27daee1f7424285f7ba7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The embedded URL 'https://ponafet.ru/wix?keyword=persona+3+stats+guide' is likely part of the malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=persona+3+stats+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374185/normal_6020344762da1.pdfIn PDF document text
    • https://rovagurepuj.weebly.com/uploads/1/3/1/8/131856033/ruxefuxetupof.pdfIn PDF document text
    • https://dopakujovifoba.weebly.com/uploads/1/3/0/7/130739833/ab056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448985/normal_604fc7df7f161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3f054cde-0430-4828-89d0-5f77035cf230.filesusr.com/ugd/d93890_3911c5209f474a9f9983ec694174ce03.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/94343815684.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/adharvam_malayalam_movie_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/cadbury_dairy_milk_mini_bar_nutrition_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea319e07-fb35-48b8-8bff-3f15374cc922/85776527168.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/brush_script_mt_bold_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/buzeposikafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab328b3-1e7f-405a-b7a5-19f8f1c16fbc/como_orar_haciendo_guerra_espiritual.pdfIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_b9910c21ceaa45dc830c0c65b4a359a9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jadere/proof_by_contrapositive_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/android_oreo_update_huawei_p9_lite.pdfIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_a9cfa8fb37eb47db842fbab398c288b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/formation_aviculture.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_off0000f31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31F 8964 bytes
SHA-256: bb6bc18a410b275b30fa96f1c4a7c3b7c29b68b435ac4bd1c42df27426b02c2b
font_01_sfnt_off00011138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11138 5128 bytes
SHA-256: 2fcf67d58d3b80d571d27772c81c7769ad55e042c61afb061c8bd7e0d2562fdf
font_02_sfnt_off000122b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B2 11220 bytes
SHA-256: d97e9668bb80aa6e50188f34cc8f31f4bc53471dba0e7f31a16197630136e8ff

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