Malicious PDF — malware analysis report

Static analysis result for SHA-256 377c2465ff7afe1c…

MALICIOUS

PDF

84.5 KB Created: 2021-07-03 08:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3323d6e626b2fbe24d01ffb614640c17 SHA-1: 0d5025181df62daa7cab86fb1c79e542d54a0a8f SHA-256: 377c2465ff7afe1cbf6ec6892bb8e3350fbb53be667bd9b77ab56202fcbeeca3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and disposable hosting. These links likely serve to redirect users to malicious content or download further payloads, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/0354866920df230c45603347071e1c5b/jagulif.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/e97f363cfa82ec8f7f8cd9f299c324c2/bikivazovuvizulimu.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/f4078510ef7d207e8f2dce6ff74ce4c3/3377567300.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab112c3ece2---68991926509.pdf
    • http://cymrozgreatdanes.com/clients/1/1a/1a407d8ccac5525c71aaafb6b4664123/File/35974199699.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2087e15d5---85450421070.pdf
    • https://amatnieks.lv/pictures/image/jelagelaxexadofavifuvin.pdf
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/zegog.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850b6c81665---1745543255.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/f7507b89cc133996ee3b3b443c2faaa2/fovujajikifusuwuxijus.pdf
    • http://rsst77.ru/upload/files/josejabewasuni.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/b19f97c57f66d93d9e32dfd6332b1a17/kosikulelateku.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/2ksavoein9muhg2p0icv57v1u7/bavizubu.pdf
    • http://schokobrunnen.com/idata/wevisujijexufotusi.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/9usrbf8ean3e6fupqqcahq4r1h/42911624972.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/7jt3qpq4vknvljgdh5a9h9va92/20523658376.pdf
    • http://backkwang.com/userData/board/file/lejoradane.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db1453547b---nugawudegitorakitofivozel.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607793f919614---37178969023.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a117af69e97---zojud.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/src11br5ogfl3i8ptmmq5gl60m/rubemupululege.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ns3h49is21n0g21njghbqj28s7/39129630230.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=pool+games+for+3+people
    • 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_off0000e89b.bin
b6c70c622eae6b94ce4b1974e174254636a60bacbaa17a358ea94e5686685b8c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE89B 16828 bytes
font_01_sfnt_off0001147c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1147C 16792 bytes
font_02_sfnt_off00012c93.bin
1cddb03a3d6d257d6b5961d45ed621d469eaa53c48c400e25707f0f06dd0a149
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C93 10580 bytes