Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da468d263cbc4ce…

MALICIOUS

PDF

82.8 KB Created: 2021-09-17 05:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d286de3d8fbe642f0dfe0dc8eddd7dcc SHA-1: 58ca9b0f928fab070311d132198b19ba1c75b226 SHA-256: 3da468d263cbc4cebbfb8985fc73ddcbedbbced426994147f46b811ffef70752
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external websites, some of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to prompt a user to call a phone number, a common tactic in phishing and tech-support scams. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://creptiles.dk/userfiles/file/jeguvivimedever.pdf
    • http://krupongs.com/images/file/lavobipa.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/19ee74b9fc1865bcf8f8cb4ebc3ce950/kutopafavesukuvenawupeg.pdf
    • http://nousgarage.com/userfiles/file/tubinenivik.pdf
    • https://ibericadearmerias.com/file/20176284847.pdf
    • http://mp-journal.com/media/file/24493296619.pdf
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/puzamowegiwawab.pdf
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/26494427075.pdf
    • https://patriciobanados.cl/upload/file/
    • http://thibidi.vinadesign.info/uploads/images/files/begojezibavarosuwe.pdf
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/74312699069.pdf
    • https://ringid.vn/ckfinder/userfiles/files/meduvesojexur.pdf
    • http://stonestudio.pl/files/upload/file/7761662387.pdf
    • http://ddservice-bmw.pl/userfiles/file/losikekeful.pdf
    • http://anael.fr/fckeditor/userfiles/file/lafuxiriboxodafovoditizu.pdf
    • https://shop-ecobati.com/medias/upload/files/7363429846.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd731c6b5c---96599373013.pdf
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/45624407969.pdf
    • http://zekejozsef.eu/FCKfeltoltott/file/fiduteledalufoguganisawex.pdf
    • http://zamgph.com/uploads/file/061215304706.pdf
    • https://toolsatool.com/userfiles/files/tabepefufude.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/465e5307717028bbf21f13b54550209d/zifojidijetumuvisopiwif.pdf
    • https://tenshinorchids.com/FCKeditor_upload/file/13828901520.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=juegos+para+emulador+epsxe+para+android
    • 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_off0000da5b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5B 16792 bytes
font_01_sfnt_off0000f26d.bin
879e48f8ad6bb80a06368b39f74f40a01549a86d41308c8fbbf5eaeafe989f94
pdf-font-stream PDF embedded font (sfnt) at offset 0xF26D 19016 bytes
font_02_sfnt_off000122d2.bin
c35bff02177fad23954b94e8a240034972c9ec1f58b3a212695621202436de72
pdf-font-stream PDF embedded font (sfnt) at offset 0x122D2 10828 bytes