Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f0ad748afba149…

MALICIOUS

PDF

86.8 KB Created: 2021-09-16 13:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9681e66d8feac192b32e45f9988ea5dd SHA-1: 11cc823c2047428a588a849049b8ec45d9b1d0f7 SHA-256: b0f0ad748afba149c108bfc10bc746e2a89937fabc6b9d5a15aa0cb8141e073c
196 Risk Score

Malware Insights

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

The sample is identified as a malicious PDF by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many of which host further PDF files, suggesting a link farm designed to distribute malicious content or phish for information. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's intent to deceive users with promises of prizes or funds requiring a delivery fee.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pistant.ru/uplcv?utm_term=android+equivalent+to+procreate
    • http://daydeothe.vn/rich_editor/file/27851074091.pdf
    • http://jinshi66.com/uploadfiles/files/batilavilitinidiwa.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410314a4b8a---90373967043.pdf
    • https://arvikabc.com/images/uploadedimages/file/91437141883.pdf
    • http://market-oborudovanie.ru/upload/file/35794528955.pdf
    • http://4998horo.gmmwireless.com/contents/files/63183157000.pdf
    • https://daaeportrett.no/upload/file/82618002299.pdf
    • http://lawfirm.vn/MINH/user_files/file/fobigirad.pdf
    • http://bm-shower.com/userfiles/files/75404506150.pdf
    • http://carzip.biz/files/uploads/files/tegokera.pdf
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/47769343477.pdf
    • https://krantiservice.com/ckfinder/userfiles/files/tiwumebonutufeluxovawe.pdf
    • https://pergamine.com/ckfinder/userfiles/files/lemevowibewodoxufifera.pdf
    • https://alley.52886.tw/uploads/files/23249551457.pdf
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/3426037663.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d0b5c25bca1304ffee2a7dd5ba532e00/simagekebo.pdf
    • https://morganmethod.com/ci/userfiles/files/pubapamix.pdf
    • https://catbasailing.com/upload/fck/file/pewepez.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e59ed31686---49650115419.pdf
    • https://minhgianggroup.vn/upload/files/50288705982.pdf
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/96415479674.pdf
    • http://www.brickchamber.com/ckfinder/userfiles/files/71378967824.pdf
    • https://mariellatriolo.it/public/file/84068922835.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5f0a385b7---42162940408.pdf
    • http://assotechne.eu/userfiles/files/libunaxaxu.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://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_off0000ebba.bin
db284f2a36b6a0c987fb8a0bc7d47959278024f7b264f9a86ef203a4f9fc7f42
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBA 19100 bytes
font_01_sfnt_off00011d84.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D84 16792 bytes
font_02_sfnt_off0001359b.bin
812dab0f73c8dd78a09f186770ecbcf33326e465e12bb89d768566b7676699bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1359B 10632 bytes