Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d0a822d770e80d…

MALICIOUS

PDF

246.4 KB Created: 2021-06-26 14:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2be005d4c5cb46f80175a31fd8daf906 SHA-1: 4c5003fbcf15b6fb64c2982c1b88397bd2234a83 SHA-256: a6d0a822d770e80d6141683ca5d75e1530187690988b6e2f42b59a80607e0081
174 Risk Score

Malware Insights

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

The PDF contains lures for advance-fee scams and fake invoices, indicating a phishing attempt. It also contains multiple links to external PDFs hosted on compromised WordPress sites, suggesting it's part of a campaign to distribute malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/1g4acnretdkpg674es4g9i8a6e/dupafevuzo.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/joqdmr8t6tnnuh82ojklrilj8m/tonevixodimasozumeve.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083b0063468d---69041192549.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f12ed053f---xuzarugotasi.pdf
    • https://alcoquimicos.com/ckfinder/userfiles/files/kazabavunorurudikiwuku.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/d5d31532ce9025e632c7706cf0796189/varujogitupar.pdf
    • http://www.zywawiara.pl/pliki/xijasevomesewagifog.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/659hb3k7e87ne8gd8jec5sh03g/90401023507.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be085db8d44---70838054312.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097e321e32bc---33772326194.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b25f44e53e---38839192196.pdf
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/figuxolufokus.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/33e2cfb32f582424e971091b12b35d51/velofijafonimuwop.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/rnmpg73vgkoi831bag53n2l6j9/20594571059.pdf
    • http://pechati-piter.ru/userfiles/file/lupalewisotarezepesuwuf.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc59c274ecc---54762249350.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/0800723f960d66187289132e1972e190/23941346335.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/885e1cf874ca0acadd9dc4598a6400a0/44274599905.pdf
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/99898529724.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/d9493a51bbedaecc8502b0bc725ec208/ketolidojapokejorikuwadak.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbb9ca151a---42344804542.pdf
    • https://fzclicks.com/demo/files/editor/file/werabonu.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/melewofikubuzosuwenisad.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/4e6f887727b2066e6b761ab7e2424189/82104869862.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=remarks+to+write+in+report+card
    • 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_off00036ad5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x36AD5 16792 bytes
font_01_sfnt_off000382ec.bin
80400f2d4d5722187d7b67b03fa4feb42a053867fbfa1e9b32cc03bc66f6c40a
pdf-font-stream PDF embedded font (sfnt) at offset 0x382EC 10852 bytes
font_02_sfnt_off00039c09.bin
1e276ce78beebaeb838c971a619df6a2a6890dc95cc63a90a190ab3a00e1a182
pdf-font-stream PDF embedded font (sfnt) at offset 0x39C09 17896 bytes