Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5bb118194526598…

MALICIOUS

PDF

78.7 KB Created: 2021-06-06 10:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 47a64dbf2d272798360d6a027fa2b588 SHA-1: 4bf3acf175b8f431c36917db12a41cb03858cef3 SHA-256: f5bb118194526598c7d2db06641a33f2ca0616e3b1aa7be2669f974d2fe92c2b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, https://laborke.ru/pbw?utm_term=at+what+coordinates+do+you+find+diamonds+in+minecraft, is flagged as unknown reputation, and the PDF_SEO_LINK_FARM heuristic indicates a mass of external links, potentially serving as a lure or a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://laborke.ru/pbw?utm_term=at+what+coordinates+do+you+find+diamonds+in+minecraft PDF link annotation
    • https://wukodotimage.weebly.com/uploads/1/3/4/4/134487216/kufinulofuledu-fudovidux-jiwowipoviji.pdfIn PDF document text
    • https://peguduzivinaw.weebly.com/uploads/1/3/1/6/131606374/480a54.pdfIn PDF document text
    • https://nirodafudo.weebly.com/uploads/1/3/4/6/134697392/pelawepeloz.pdfIn PDF document text
    • https://vunemagerubu.weebly.com/uploads/1/3/4/5/134525741/wotazaposu.pdfIn PDF document text
    • https://fojaxusulilunud.weebly.com/uploads/1/3/1/3/131381134/dudafilupujof_mawidirulef_zugigawuva_fibigot.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
    • http://tufukamapaf.pbworks.com/f/how_to_fix_myself_to_save_my_relationship.pdfIn PDF document text
    • http://fetinaduv.pbworks.com/f/lady_gaga_ft_bradley_cooper_shallow_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dafcaa6-0195-4126-9bb1-dbbd8f214c14/42393330879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d96d2c2-d4c4-4057-bdd4-1ac6e220b08a/how_to_draw_ganesha_in_pencil_step_by_step.pdfIn PDF document text
    • http://duriwug.pbworks.com/w/file/fetch/144614862/66038257306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1350c3b2-fdee-4b42-97db-78892d28c605/63297264032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d28bd8c4-d140-4078-852d-91264936ea90/56116581289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba790af-1cc2-4d7e-97d7-4ca360e72b43/2007_suzuki_sv650_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb130d2a-f5f6-4aa0-bca5-64e299cc1019/adidas_yeezy_calabasas_track_pants_size_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b93ff37-d23d-467a-9e1b-00cb308f9d81/seventh_day_adventist_church_open_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276b255c-d37b-45d2-8396-14d266750511/nexowodison.pdfIn PDF document text
    • http://gexufak.pbworks.com/f/76257141496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04bbe866-043f-42c4-8f8e-2966faf4c057/madinuxoxijadavonolomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d13f404-7f1c-44fc-8c29-e011d1f6b63a/996277598.pdfIn PDF document text
    • http://palixazoke.pbworks.com/f/69726041309.pdfIn PDF document text
    • http://povelin.pbworks.com/w/file/fetch/144420213/89658192160.pdfIn PDF document text
    • http://redelaw.pbworks.com/w/file/fetch/144705210/86772961009.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_off0000e825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE825 5292 bytes
SHA-256: 2dc6f39f26f13cd8531ca59d3804e9f147ec1f28eec5ad935b12db6fe4134831
font_01_sfnt_off0000fa02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 10748 bytes
SHA-256: c1a2b3e442c3cdc79c2e8f25dd13c785494b603eba1b59d72e558bc8bb10631e
font_02_sfnt_off00011ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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