Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a0feeb01747a85…

MALICIOUS

PDF

82.9 KB Created: 2021-09-03 21:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 32e9113d011ad91c9ef71dee78498b73 SHA-1: 4fb0066b3a97bb01df0dd015b5078f0682a8e840 SHA-256: f7a0feeb01747a858f1b1bc9246748f1774c75eac776fa57646e274ef7df034f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which point to link farms on disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=arduino+mega+caracteristicas+pdf PDF link annotation
    • http://cokhibaosang.com/media/ftp/file/gaxomekorupetulit.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/83100858002.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/51311261909.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/14630722595.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/kenuzivojeromefaxa.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210627_002656.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/7222523475.pdfIn PDF document text
    • http://remobudostol.pl/pliki/potexomi.pdfIn PDF document text
    • http://usagimatur.com/files/others/waman.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/67166812696.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b4d0365e6---73501594126.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/42640323177.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/8340c98b404d066e3894938b7de5bdff/sutabevedidejazanoj.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/22925008323.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/14/file/20210514_121440_180.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/08/file/getibujef.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/67e4ce2f66818f5907e2fd3ecfdd1998/13698092339.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/a2e092c27b8337bbd19c4d71110ea24e/44653412412.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/0ad70bb751e702334d09fbcd420d2157/kurimum.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/9316946904.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/mofarerud.pdfIn PDF document text
    • http://hotechike.com/files/files/75687644795.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/d217072c5fdca0cc5237b6b75b06976f/61864647263.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/p76bqt2jbsvqirtsq1tdkcbqmf/85616024065.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16078976e57896---46504725206.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5F 11000 bytes
SHA-256: f946cd689b97c51b41fb58488914735931ddb165681169553788e532aa878eec
font_01_sfnt_off0000f7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 17792 bytes
SHA-256: fe21ef71811602f83ba3784c7b1c61bd8fa5bb5e66526d5c7a2197164c4c46b7
font_02_sfnt_off00012597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12597 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.