Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e8e29046b713b7…

MALICIOUS

PDF

72.6 KB Created: 2021-09-06 09:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1aca9d30740948589c103a6781663755 SHA-1: 2e8b80177f550573238eae67d6403aaf70ce232d SHA-256: 73e8e29046b713b76896f881fb311a56e7595ddd2f2e4ef14a31525984ffa0c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URIs are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/uplcv?utm_term=a2+level+english+test+pdf+with+answers PDF link annotation
    • https://art-gallery.mn/uploads/files/99273680335.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/janebazuterekibarizikejew.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/34cd2da8c0023946df54143b921827a2/pegin.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/758ae11588d6f636d250a671b20c55a9/lobugaxarelolinob.pdfIn PDF document text
    • https://ekransamara.ru/files/bisokofofi.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37de6be9d4---vafezizaw.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/30af43a90991d93ebc9d0150eb7f8d4c/nitevufikanenomuba.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/b67a1060acd48db226570674097652a4/rezebox.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/61598966313.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bb16962cc---xegavidoj.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/bezulat.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/vesaxenebub.pdfIn PDF document text
    • https://jetaime-shop.com/files/ximulubijew.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/a149836cc8170b2fcfcd2e4c9f6c02a7/69682530626.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/zukobiloganiruwugosidob.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/fisogapu.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/hequ74f731gvedbn1a10o5e1cb/jipuna.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca7da68e38---43572665096.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a477c6419e0---13001468755.pdfIn PDF document text
    • https://marbletreasures.com/uploads/image/files/xifesetujazilotusoj.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c912f554de---79171497593.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2523a7b4db---sulopamo.pdfIn PDF document text
    • http://tayles.com/uploaded/wilevebexo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D1 16316 bytes
SHA-256: bd884c1e5774ec5ad5b4ed2bda97cf3a465bb03b374c53d71a8ad229778a6602
font_01_sfnt_off0000e3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB9 10908 bytes
SHA-256: 1edf94cddd987465911e68d0b348c858cba8fc73818143c16dac116ff2cef1d4

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