Malicious PDF — malware analysis report

Static analysis result for SHA-256 03abfe97e2c2191d…

MALICIOUS

PDF

85.2 KB Created: 2021-07-05 19:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e6ca2626dcb10e5da6f5f221113a3a40 SHA-1: cc2c34ca00051f67880bd4048141a2cf883785bf SHA-256: 03abfe97e2c2191daea428a40b15a5c0a1ebc2621b4e84a3b8434cedf1af954c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, directing users to various URLs hosted on compromised WordPress sites, likely for phishing or malware distribution. The presence of multiple external URIs and compromised CMS upload links indicates a deliberate attempt to lure victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082b3f5b0bcf---65229829586.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd241cc3d5---suxugozon.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a10fc91e7---1518655857.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/2a1a89b999e41542643bfd3302522eb3/61441623195.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/cd382263ae091da29411b34cb18b4319/85769332170.pdf
    • http://elise.pe/images/file/38970876896.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb48b8d0b3---nenofelofizemagutaxu.pdf
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/f46a3ce772d07af6d2b2c94942ad1ab0/73043019265.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079601de07bb---61940757499.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/2gqro0mbrrpsip1r73ue4aeula/73864589885.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/cd20be9ee2c723e760ff520eab8eadab/nenadaj.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16076c1ae0acfa---nesepotokugo.pdf
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16499380878.pdf
    • https://actorconseil.com/files/file/53341388944.pdf
    • https://burgas-remonti.com/userfiles/file/ditidiwi.pdf
    • http://legalinet.eu/userfiles/files/pudejag.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8457c690d---87755029249.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/614fefe33f9617d5d21e14717c5b5486/depogizuw.pdf
    • https://pjkconstruction.ca/images/file/70726720860.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/1c539e5c4e902544fa00193f2c33c226/jaxinukin.pdf
    • http://learningkey.org/userfiles/fivejufixubolefedokisiki.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/917dce27f7dd7312c8d2faad3de4d8c8/fugonajiw.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/vn66djfplbaec2hpvr6s2ei2ft/18417658720.pdf
    • http://smn68.com/clients/75339/File/xavolokitojodivi.pdf
    • http://bycongroup.com/UserFiles/file/55168635884.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=total+war+three+kingdoms+duel+guide
    • 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_off0000e99b.bin
d90bb91571a028fe7406daa161ff3721cca07d38ca008947459c944ace76d7a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE99B 17300 bytes
font_01_sfnt_off00011689.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11689 16792 bytes
font_02_sfnt_off00012ea0.bin
0886c5d4645dd24e5731a4e760bd1ef3a22a096ad0cbd90d24393c350b710127
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA0 10936 bytes