Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce2cdea23e098a0…

MALICIOUS

PDF

77.9 KB Created: 2021-09-23 15:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0df7a713121091f179f9c273c51bce57 SHA-1: 5be3ec062b1664558e69c640199b90cbc474550c SHA-256: 8ce2cdea23e098a04c4fa7dd901c4aae7074343b39d793ac91b6223ff25031d5
204 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The presence of embedded JavaScript and multiple links to potentially compromised websites suggests an attempt to redirect users to malicious content or exploit vulnerabilities. The 'SE_CALLBACK_LURE' heuristic indicates a phishing pretext, likely to trick users into calling a fraudulent support number or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/2umkkamrqiq65lk0efq5hjjjnd/marevo.pdf
    • http://quatanggiabao.com/images/uploads/files/gopuvenabik.pdf
    • http://rentbucharest.net/images/userfiles/guduvidividuvijolifin.pdf
    • https://fullgame.hu/uploads/files/72702137862.pdf
    • http://infiniti.e-library.tw/uploads/files/fidodunerilomo.pdf
    • http://online-cycling.com/files/file/zajajinigukibolakat.pdf
    • https://dreptultau.hotnews.md/upload/userfiles/files/23225763774.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140e9c357675---xotivupifig.pdf
    • http://droneducational.com/admin/userfiles/file/40410284712.pdf
    • http://maulich.vn/attachment/files/pojebesoti.pdf
    • http://arisutour.com/ckupload/files/fisarumuvexi.pdf
    • https://sluganarodu.org/userfiles/files/wodakinitakuw.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/4c42bbe32990e49c0b61ad6df53e989b/55495199611.pdf
    • http://apex-architect.ru/images/file/35759177431.pdf
    • http://pttaccounting.com/userfiles/files/donukebabawefemexu.pdf
    • http://127.0.0.1/bantraicay/js/ckfinder/userfiles/files/luvukusuzumowujutesoza.pdf
    • http://ffarchitettura.it/userfiles/files/56581997600.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/st5lumuene9ve6t6rks6rq8t7a/10851772732.pdf
    • http://joesservicecenternj.com/userfiles/files/demizuzezudapov.pdf
    • https://mbp.hastatis.com/mbp/upload/images/images/upload/ckfinder/88050427522.pdf
    • http://biblioteka-belzec.pl/upload/files/fozomisu.pdf
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/95183555438.pdf
    • http://jiuxingchaoshi.com/uploads/file/101357336554.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16139616889c38---zipaguliwol.pdf
    • https://thisissati.com/userfiles/files/gozidufoxumudorod.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+send+my+contacts+to+another+phone
    • 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_off0000ce13.bin
c591590d835f516e3da41ad49837827c84707d35d479d38b44d5b8a8437bc028
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE13 10832 bytes
font_01_sfnt_off0000e6ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EC 16792 bytes
font_02_sfnt_off0000fefe.bin
fecc94ca2706d31ecf78d8ccaba155469faa9a375b3d6d984ab250cb0b077913
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFE 16536 bytes