Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a4eedc299d7453…

MALICIOUS

PDF

81.4 KB Created: 2021-09-04 18:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc8df2f22b1260e15bed84435c602418 SHA-1: d249a539f0fa8c8b85171a7e660e21a54648a28d SHA-256: 22a4eedc299d7453672a37786586826fdb324ba19a9ed3379b2c3a20956ece0e
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, presenting itself as a parcel delivery notification to entice users. It contains numerous links to disposable hosting sites, many of which are compromised WordPress uploads, suggesting an attempt to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/219569385500cdc813cefc95ae16eb08/siwukofaripu.pdf
    • http://stadion-zarya.ru/ckfinder/userfiles/files/pelekitizatojopabomakexox.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/bd5141939c79a9fd507f5064f3fe5088/terilukuxamojugef.pdf
    • http://foodchemsino.com/d/files/92053083262.pdf
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/47403134448.pdf
    • https://nanosoft.mn/images/content/File/41330889803.pdf
    • http://zjqzzx.com/uploadfile/file/2021071520421173499.pdf
    • http://www.scsk12.org/policy/files/files/tatorejozadapuvamekugas.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba79eb30996---6998380523.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b37bea1e8b---6312926157.pdf
    • http://kassa.pl/userfiles/file/taferevivu.pdf
    • http://wsp.pl/userfiles/file/82386967906.pdf
    • https://congthuonghotel.vn/app/webroot/files/images/pages/files/fodubane.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/6e00d7253cb66a03b9519cddcd897083/71072600955.pdf
    • http://ricarda-allegra.de/userfiles/file/17566249382.pdf
    • http://daiichibus.vn/uploads/news_file/zupagipoviwej.pdf
    • http://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/44968162801.pdf
    • http://coreaad.com/DreamDataUpload/file/pizuximolefolozirufugu.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081a282267b9---wegonuwanuk.pdf
    • https://harteron.ee/userfiles/file/90557601546.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/40c0fcf7becf0ed54580dad5a887c6b1/jisowozejonexitone.pdf
    • http://marcth.pl/media/fck/file/29111679436.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7d9859612c42766730381bd3bf327443/16194539863.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf7eb5da72---21920045449.pdf
    • http://weifong.tw/fckimages/file/6153669914.pdf
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/wadagowokivezapopi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=enacfire+e18+earbuds+user+manual
    • 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_off0000db42.bin
a9fce5f4dc50ed1738ff16e32b5cd54ddd59d6424b7cf4759d677ca9b6277703
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB42 16560 bytes
font_01_sfnt_off0001065a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1065A 16792 bytes
font_02_sfnt_off00011e71.bin
6e788ece999d995c68c40177d8f7cb73bedf25c9da62938ab86fabb9e58da096
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E71 10904 bytes