Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e5e045b5e45634…

MALICIOUS

PDF

76.6 KB Created: 2021-02-21 00:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 15651b8ab48f914690898f9b8864a7a5 SHA-1: 9f6d6a53f0abd51c0a1d7ad9555a86efa1c7e93f SHA-256: d7e5e045b5e4563472176034a32e22ebc1ab649d8c6a41759b2b980f87cb4391
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it is part of a link farm, with numerous external links, one of which is identified as a potential phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

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://maypoin.ru/123?utm_term=fo+error+code+gree+mini+split PDF link annotation
    • https://latopilufazi.weebly.com/uploads/1/3/4/0/134017217/86c97fa7.pdfIn PDF document text
    • https://zofisafewo.weebly.com/uploads/1/3/4/5/134508124/babadatubomixota.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467043/normal_602afe992bfa8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482413/normal_5ffd46548972c.pdfIn PDF document text
    • https://cdn.sqhk.co/dilipokoje/4mlVhcb/82218365074.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/fighfhg/read_music_faster.pdfIn PDF document text
    • https://lotekovikerux.weebly.com/uploads/1/3/1/3/131398560/gufinu.pdfIn PDF document text
    • https://cdn.sqhk.co/sofetarunox/sigjcie/4665558923.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/slghdhh/36928555085.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/LxGifha/widget_moto_g5_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478415/normal_5fcc0bf52b67b.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/tetofamuxulil/munidagiwidupu.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/sevexebilib.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/improve_your_english_vocabulary_book_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/look_back_in_anger_act_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/arquitectura_de_computadoras_alfaomega.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/19836356633.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/escape_room_game_answers_level_113.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/bukubalojuwinugorebal.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_off0000f023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF023 5140 bytes
SHA-256: 44d34d036b1e82e10e04fb17bedf53553ee79c34c85a42b4ab70321d6ce01d79
font_01_sfnt_off0001018d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018D 10312 bytes
SHA-256: 4db1f0f69dde3343e1d0f4cf24aaa34f9d800b42a9320b349602b300c4f3f039

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