Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8e33d4724808ed…

MALICIOUS

PDF

79.6 KB Created: 2021-07-02 20:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d7aaed061af9aaeee1d92a4f02a1c1a3 SHA-1: 846bf0d877c800d609cf1f84e9dc8eb87ab47989 SHA-256: fa8e33d4724808ed07a644ccf9d42a95e876d723eea9cc20c9b0760d577623f8
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The document body was unreadable, but the presence of a link farm indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://bloomx.com/sites/all/sites/bloomx.com/files/12357195011.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/r204cnnvmdqnps4rdcd4l1jm5s/wokixemexigavi.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/98bbb847b1d921c327a8545abb8f0795/80472760276.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/62ac494e5it7hnesq3cred66ld/lawufetaderosen.pdf
    • http://ddrwc.net/clients/869849/File/paloduvok.pdf
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/29182258955.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/1320574c077e226220ef59c6adce036f/wepujananifekeduduxe.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160792f87daff2---25689735828.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cefb4c0986---zifutowarufu.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608e23fd1c7b4---7693353433.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086f90be3a0a---45944221918.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b38ea34a7d---jejadukena.pdf
    • https://burgaseguros.com/userfiles/file/48512912111.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fab40d87d---lujovilubutunopozojaru.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763d29f2d8e---71818244030.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/wamuzelujojixuki.pdf
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/logilitunafogew.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608676a80d7a5---bogajejanaxomejig.pdf
    • https://beaszemin.com/files/xalejugato.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e7595a9a5---jikov.pdf
    • http://mobilesamara.com/img/files/file/96905606382.pdf
    • https://abicecream.ru/ckfinder/userfiles/files/92893291102.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609a067eeb5af---mapenaku.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=tyler+perry+i+can+do+bad+all+by+myself+the+play+123movies
    • 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_off0000cffb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFB 16792 bytes
font_01_sfnt_off0000e80d.bin
9af990de4627aa7b73565ce3c46bfd25ac74ebadaed561ef0b8e0fe8a436b10a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE80D 17608 bytes
font_02_sfnt_off000115d5.bin
8fed68503b81ccf226f907646c46414d473fc2d4de0b7745ba39dca6e63f75c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x115D5 11512 bytes