Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7431b249bfc006…

MALICIOUS

PDF

135.0 KB Created: 2021-03-11 16:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5622136508eda6fd20d9fe6388748676 SHA-1: cf9475b6928a3d944515a8ca0fd480b714d29bcb SHA-256: fd7431b249bfc006e369a29a48d8d4e50ac67f1b02316fecaba8047bb6e8a48e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with the primary ones pointing to suspicious domains like 'dugedepap.ru' and 'myshoes.moscow'. The document body, though partially corrupted, suggests a lure related to search queries, indicating a phishing or malware distribution attempt.

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 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://dugedepap.ru/strik?utm_term=que+es+un+autorretrato+definicion+para+ni%25C3%25B1os PDF link annotation
    • http://myshoes.moscow/jaxageguyqhd.pdfIn PDF document text
    • https://vemenujobife.weebly.com/uploads/1/3/5/3/135399872/kupediwofanuxu.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/090f496f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443802/normal_5ff9c52bc5da9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421783/normal_5fe0d525a3a02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_603233b16b414.pdfIn PDF document text
    • https://biwewonopegad.weebly.com/uploads/1/3/1/3/131380063/fusebebimexaralo.pdfIn PDF document text
    • http://farvestnn.ru/78074319909smu24.pdfIn PDF document text
    • http://gatorama.fun/rearranging_jumbled_words_to_make_sentences_worksheetsydqm8.pdfIn PDF document text
    • https://lenonexijinex.weebly.com/uploads/1/3/4/6/134647177/fdf9c317a4.pdfIn PDF document text
    • http://italia-doc.space/online_racing_games_for_pc_3d3lh30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486772/normal_60149faa9d72c.pdfIn PDF document text
    • https://xijiweba.weebly.com/uploads/1/3/5/3/135387982/71a51ab1df423ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0475c6e-cb50-45ca-b3b6-b9af060386e5/what_is_the_difference_between_an_llc_and_a_corporation.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/16733616035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1662c64-bed9-4360-afec-ff1c2e86f8f2/the_zookeepers_wife_full_movie_download_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d032f31b-656f-49fc-bd49-215e82050af9/kibux.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/calendario_2020_ecuador.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/tifujubiranira.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_off0001ce32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE32 5392 bytes
SHA-256: 10cdcc227143107e462f547520f776d30f590de1433c789746f8d4263ee43cfe
font_01_sfnt_off0001e056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E056 13784 bytes
SHA-256: 9ee58b46030e89ca0c4c0a2ec87f741fed24ede41a351aa8ebf13e237d8d6449

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