Malicious PDF — malware analysis report

Static analysis result for SHA-256 402e745bb6e5d0d2…

MALICIOUS

PDF

86.4 KB Created: 2021-07-30 19:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7486ea51f1dd3e441d1360dcd86a71c1 SHA-1: aa1089a6f9650b8f3de903de878b06a0cfaa5b08 SHA-256: 402e745bb6e5d0d2815007da45fd47c50420e5f08295b9b18f0966a15ed239a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm heuristics, indicating a phishing or redirection attempt. The presence of ClamAV detection and ML classification strongly suggests malicious intent, likely to lead users to compromised websites for further exploitation or malware delivery. No scripts were extracted, but the overall structure points to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://smidgel.ru/uplcv?utm_term=the+hunger+games+mockingjay+part+2+download+mp4
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12a7ec7e1c---ferelirivaxezowifif.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4d094ed24---35304564932.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/42a9bf83ed73fadd5d26e3e25bdb36e6/fabifinopejulubokegivowav.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/1vi30d42slrej0ab6eoq4q8t60/25653817130.pdf
    • http://capesociety.ca/uploads/files/bujuwemanidesalada.pdf
    • http://hotstamping.pl/files/file/libeg.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/3e08af72746729e24cba9614fdaa480c/jedatokixokoku.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/7f9ceea69934e742dabf9d75d07542f8/tojogi.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160749f837aacd---52630947485.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f513217602---vidijagini.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/57350458e08934e2064a54e2e6b2ab27/xexezapife.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160717a5d79182---78967999630.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608530ed2d062---73981638983.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160757159d33c3---saxakimebivo.pdf
    • https://xo-sound.ru/userfiles/file/wapubizurezakumajavawet.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608532d46cefa---misovumifizoxuwe.pdf
    • http://www.sudaff.com/pics/file/sotuzolixodinujarafaw.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/7e8k49noih1ctk5tqlgk36j8c2/8231221911.pdf
    • https://china-glass-mosaic.com/userfiles/files/20210719_055312.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/290332cebba2611d367414a39a0fa602/21645039319.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16076d88325828---86142763886.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001118b.bin
a246219bbba0fe294a80ea1db54c65cd7233ddf0c7772b8f9fecdb92d3b9edc7
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1118B 18736 bytes
font_00_sfnt_off0000cd65.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD65 16792 bytes
font_01_sfnt_off0000e577.bin
774c81a4e4956d772f1566a760532a82e040dfea11764c8552cd82696ba11507
pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 16852 bytes
font_03_sfnt_off00012f00.bin
40a73651a154aeccb352dd7963dcb80a7aee98e25d8ecd23282e1e2ce3246d1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F00 11644 bytes