Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7369b8298f5eec9…

MALICIOUS

PDF

87.8 KB Created: 2021-06-28 20:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b2e1a98e1851766f58aecca9ed08596 SHA-1: e7624d559ab4f5a8c90e1f41dbf378e3da1c631f SHA-256: e7369b8298f5eec93e7c977b99baa2cea5a6d793939af4fe01ba0f9753d23707
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://busankid.com/webfiles/board/file///58337438607.pdf
    • https://szekszardportal.hu/userfiles/file/91377704927.pdf
    • http://htwy.com/upload/file/mesijegapubakorag.pdf
    • http://tokstar.com/_UploadFile/Images/file/97083528112.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8448ead7fa---podekisoxagajira.pdf
    • http://dianacb.cz/userfiles/file/32933500101.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/dd5abbcb4d035d067e6c4649154263dc/20707935642.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607166a4efd0b---finameluzapudufiwilenegop.pdf
    • http://lovesushiscv.com/uploads/files/78407003960.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a178e1ec6a---xunojadu.pdf
    • http://recviem.ru/img/upload/31095799919.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88a112fe3c---ligaditoras.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/galawikeguvafuzegimuve.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/s7ujumhafmmoegutrhc2n5caov/xepitoporunuxomerurunidu.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/b5ed1d342d90e3469d44ad267b5c0aa1/94284185007.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/m4nnu23jlsbpvjjl659q1k7eh7/dubaxu.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/ecfb59c4ff23020da7f30b661cd15ba7/62780165550.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/e70b77df1d8cd3b55b3468cf9e788403/56765801601.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/1fed9fc816c056ee95c24e1daaf43181/41308867623.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3202c3775---wibozu.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f7e492fc6---zojogolizufaliv.pdf
    • https://fiberglasssupplydepot.com/userfiles/file/tavuzufikipijuwipij.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dd822cff4---lajob.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=tender+meaning+in+tamil
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000c0e2.bin
d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC0E2 18328 bytes
font_01_sfnt_off0000de7a.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7A 3464 bytes
font_02_sfnt_off0000ebfa.bin
63147f5d6579c413bbd66a8d9887920cd0817d6ad0129bb41bc165f607bdb667
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 10264 bytes
font_03_sfnt_off000102c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102C3 16792 bytes
font_04_sfnt_off00011ad5.bin
0df441baa5406dc7c84eb4f558a0d5f07b720cc8f1ae961821ea0de1339a3436
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD5 21624 bytes