Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e142d73e7b982b1…

MALICIOUS

PDF

82.8 KB Created: 2021-03-25 14:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbc8ed1adfe6e5de8d948cd0d4cacb82 SHA-1: 72a8637448c6ff672d8e520e87f6f4d60b904d63 SHA-256: 1e142d73e7b982b1aa8b0bb314bfff4a1e1b0a2ee49d89042370dc26255af038
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDF documents, suggesting a link farm or SEO poisoning attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into believing they need a password to access an archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://lozipotod.ru/award?keyword=canoe+paddle+plans+pdf
    • https://senemoribut.weebly.com/uploads/1/3/4/7/134703027/6e59223d0cb63.pdf
    • https://wuvobarapupi.weebly.com/uploads/1/3/0/8/130813490/3617871.pdf
    • https://lovivusopeme.weebly.com/uploads/1/3/6/0/136095788/luvegagivad.pdf
    • http://badgesverified.com/best_board_games_2020_boardgamegeekzkpq8.pdf
    • http://powerpoint4you.ru/guided_meditation_on_impermanence6mtns.pdf
    • https://fiwozipuwawew.weebly.com/uploads/1/3/0/8/130814157/kopixazosuka-fetegufar.pdf
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/5792325b0e1d5.pdf
    • http://flylovel.com/24438576401upx2i.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d11d5891-4d41-4cc4-ac48-5ea1c5c7698e/how_to_read_stock_quotes_for_dummies.pdf
    • https://uploads.strikinglycdn.com/files/c3749773-a0cb-4099-8948-ed6a8015d80d/how_to_do_an_advent_wreath.pdf
    • https://uploads.strikinglycdn.com/files/2999e193-004d-4db0-a6ac-40d8f64ec13b/fitokujufakosipuvasuj.pdf
    • https://s3.amazonaws.com/tapelu/boliriloruvo.pdf
    • https://s3.amazonaws.com/runuzitexokol/dorothy_perkins_jeans_guide.pdf
    • https://uploads.strikinglycdn.com/files/8b417bcd-454f-4a5c-8da0-35d7b33264db/shogun_james_clavell_book.pdf
    • https://s3.amazonaws.com/vovuzize/brand_identity_model_template.pdf
    • https://uploads.strikinglycdn.com/files/f7df1573-861a-424b-a8b5-1bf9c778478d/samsung_6_series_4k_best_picture_settings.pdf
    • https://uploads.strikinglycdn.com/files/9e106970-3174-44af-9301-5ee1435a0ab9/vizio_e231-b1_power_cord.pdf
    • https://uploads.strikinglycdn.com/files/ea4da5ec-c7d9-4ccf-9c21-11854a454216/50490208469.pdf
    • https://s3.amazonaws.com/batiku/anticorpi_monoclonali_sclerosi_multipla.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001089c.bin
27cdfc885f6c4b443e883b6679ddd57d0e2de5afd7d3e150ef3d8f453277b0ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1089C 4844 bytes
font_01_sfnt_off0001192a.bin
85f07296224cbbea068609b64b2b0924398ca57baf11ea3df3e2e6e6f9ed1f7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1192A 11252 bytes

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