Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2798aafb019a17…

MALICIOUS

PDF

89.5 KB Created: 2021-06-28 07:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ab87852b61977913110c23de2ee3400 SHA-1: ae766f51567bd3ea57f5e452119077fb6e75ac0b SHA-256: 0a2798aafb019a178ec5bf51dda1d25aaed898837e119f463eadc161a2e567d1
196 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with specific heuristics indicating a payment redirection lure. Numerous embedded URLs point to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute further malicious content or phish for credentials. The document body was unreadable, but the heuristics strongly indicate a business-email-compromise pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/54910523a1b377b2ecc933c5087cdce3/fumafinarewixu.pdf
    • http://myucpb.net/userfiles/file/tubixejazalaravelipovupa.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdfea3e710---najejudenufudasizixudoga.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/m1furmomgp2fnt2opk6nvbtqoc/lasuzobutaruv.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e832e0fa34---64981890281.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a874bf16d6---lidupivep.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bade9004661---mefukupukuzalilegukulog.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607534d930c27---1447021391.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1bd78a155---zenetujonudoguzamavaxi.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/c0ta9rg1evio8ighh9bsbldnhk/nufezovewum.pdf
    • http://proxima-design.cz/files/file/61942823686.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3dc4af0cb---51746350996.pdf
    • http://ed-web.cz/userfilesfile/pixubezonuzajunojapuso.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16072348ac7945---59633846903.pdf
    • http://stylekd.ru/files/kakujiwimuvowezenenupib.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5fa009e8f---xilarudexagoze.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb7cb25ae9---zofanixejujepufuro.pdf
    • http://flomojapan.com/upload/files/bonos.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d0c2778fc---27254943096.pdf
    • http://amghanoi.com/images/ckeditor/files/zajaguzogemono.pdf
    • https://acrgroup.nl/userfiles/file/85730702241.pdf
    • https://festival.bg/fckeditorfiles/file/saxejerusunagig.pdf
    • http://ordinate-ltd.com/file_media/file_image/file/bujowojesitiwi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=free+rewards+for+students
    • 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_off0000f94f.bin
063572cd3ace5339ea37991a6e753709b72f464218fcf3efe884aa588e4f627f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF94F 17608 bytes
font_01_sfnt_off00012785.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12785 16792 bytes
font_02_sfnt_off00013f9c.bin
41a87a67485cd07d51168d48922d4af5248d609b902897dad10312716c5b6dc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9C 10372 bytes