Malicious PDF — malware analysis report

Static analysis result for SHA-256 536fb4202a49b482…

MALICIOUS

PDF

77.9 KB Created: 2021-09-14 06:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 31f22336fe353053a9690f738f3bea8b SHA-1: dd4111eefdc993661d4524c211de0f40f9c00312 SHA-256: 536fb4202a49b4822ead0480983ac47d3877dabcfb351d4ebb02f9ce11ce90da
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and external URIs, combined with the 'SE_CALLBACK_LURE' heuristic, suggests the document is designed to trick the user into initiating a callback, likely for a phishing or scam operation. The document body is heavily obfuscated and unreadable, but the heuristics point to a callback phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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
  • 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.
  • 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://mobilaide.com/upload/editor/file/fowamigilola.pdf
    • http://evevoyance.fr/adh/.-/file/57711630442.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa1e65afec---dosobijixefowusitol.pdf
    • https://contabil-fiscal.ro/mm/file/39805676543.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613e915530dc7---28106350049.pdf
    • http://autofactory-jin.com/js/upload/files/24733198973.pdf
    • http://hotel-gerard-dalsace.com/upload/document/pokawemomesaxaritarex.pdf
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/91074673752.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/kulb13n7r451bnaps3d9tmu9cc/gojasar.pdf
    • http://uniquecharacters.com/upload/files/60567534147.pdf
    • http://nfraccon.org/userfiles/file/nodajususegagimad.pdf
    • http://usmleworkout.com/files/file/bemudetudepolalatekukariw.pdf
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/11390912985.pdf
    • https://cokhivietuc.com/img-vietuc/files/tizonelowofuvoxit.pdf
    • http://pitchdecor-construction.com/user_img/files/sepodisusukik.pdf
    • http://gmicropilotes.com/uploads/files/jalemezad.pdf
    • http://thegioioto.store/upload/files/4615629900.pdf
    • https://rolcsi-bau.hu/userfiles/files/mujup.pdf
    • http://miwon.com.vn/app/webroot/uploads/files/21242733849.pdf
    • http://bankerz.in/qpic/files/puxanixudijevuxaduden.pdf
    • https://fzclicks.com/demo/files/editor/file/xukulinovajasiguwixiwibe.pdf
    • http://huefpdf.org/upload/file/woragosepagesoli.pdf
    • https://mallncart.com/userfiles/files/89818016135.pdf
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/17552240740.pdf
    • http://gillsandgeckos.com/userfiles/file/18529720941.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=phone+games+to+play+with+your+girlfriend
    • 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_off0000cc2b.bin
fd52c6459ac9be43d51d9358736f4f92c7fa75575e0afd58f14e9ef4953af523		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2B 17056 bytes
font_01_sfnt_off0000f7fa.bin
fb4e7260e0c9a1e3b8379e13100b1dee36735c71cb04ddcab35e1585900b007c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FA 11244 bytes
font_02_sfnt_off000111ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111FF 16792 bytes

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