Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc227347002444e…

MALICIOUS

PDF

93.5 KB Created: 2021-06-27 21:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b656aa121d4fc63d991931c541c4f7ef SHA-1: 32b03238881763ab86752639db7371f7fb7c1834 SHA-256: 3fc227347002444e53a517b63f9bc499914296707b52c711a843798f9838dc50
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was identified as malicious by a ML classifier and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm, suggesting an attempt to redirect users to malicious content or phishing pages. The document body, though heavily obfuscated, aligns with the heuristic indicating a scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/e82fdb070c1f16609a5d1ef0fc9e931d/72101362776.pdf
    • https://kopari.hu/files/file/dowigevonuje.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/ga5vmj1u4up7itks4avkd9tsmn/59838011593.pdf
    • http://jiangsutravel.kr/userfiles/files/20210626_104129.pdf
    • http://geo-equipe.it/userfiles/files/lomonititavedaralewivik.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606ee55b52e8a---7799365714.pdf
    • https://alice-immo.com/userfiles/file/nufimi.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a21329242---1450823444.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/622526205c7cce2b727e4af630cae43b/1757948188.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/fb6f5597d5dc9141bf2b4ecdeb3f273c/lipag.pdf
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/movupokukusoselezu.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/1fee3385b3aca64cc203aa0c28d71364/jaripu.pdf
    • https://coil.hk/upload/files/katotupabajo.pdf
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d5b425c84---93534265325.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160721dab266b7---zarolidonij.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/4d7d414113953ce41457207f57339688/kimodowatarovazotamav.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1baf69d6a8---pawovod.pdf
    • http://teechart.com/uploads/images/files/82646270868.pdf
    • http://af.ssla.ru/images/fornews/files/bopina.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/c9a254f08679ff7f02faee10f3449df4/20234976366.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/da1909e641de12b1b67c1d23ddf16e80/katebilonazapukulufoge.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077793682dc0---vekokukafowikot.pdf
    • http://tourister.kr/userfiles/file/zileguwotezozuzelotufute.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/sjqj1o6k9ard9ab1tenmfnibef/xusamowexeteniw.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/acf6022c778a93a392c9b8d7c564454c/26219651297.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=difference+inflation+and+deflation
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b55.bin
48ad885a03c4ea380be3d663fa0cba690b139330b5d35b327235cf06eaf74dab
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B55 17464 bytes
font_01_sfnt_off0001392c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1392C 16792 bytes
font_02_sfnt_off00015143.bin
094b3e7082678189be0cda54db5bf9b365191a6fa9cdc9b171a6fc0a5db144d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x15143 10304 bytes