Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5c970563c29964…

MALICIOUS

PDF

81.5 KB Created: 2021-06-19 21:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2e58be4be6a84d2addbd7ef3ad242b9 SHA-1: 8bd2a88cf690476456f0ba6fbc936c51744fde7e SHA-256: 1e5c970563c29964bdd0db52d301cc1062b59c007eb5bc7adbce107a901f130a
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, disguised as a download for a game ROM. The primary heuristic indicates a PDF link to an algorithmically-generated URL, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://inwebjor.ru/uplcv?utm_term=pokemon+dark+cry+version+rom
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c1613567f95---32762706480.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/400kigeqsdonliho1dsiecimem/rutofijofonikuru.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/tppjn5qu7blk2bapdup4ibbebf/24416400207.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/9amoc5qopcrj5smcv84k3fdael/lelefujivajedupoxot.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/8ed00a2d445213241dc508ab3c7a0f0c/dipediwuwebo.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16082060cf2d14---zumofu.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085835709cd6---bevanale.pdf
    • https://aulacvn.com/upload/fck/file/bumozatitafuwag.pdf
    • https://angkalaris.com/contents//files/valon.pdf
    • http://aire-limpio.com/img/editor/file/1564532942.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b5db25c0f---tirina.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e070d65d8d---17531097949.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607369adc1634---9235180161.pdf
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/4128658334.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/o6jsiusinji3i70iruc70mrcj4/kemipixiximesegiz.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/bfdc9f2f2041c2af8ccaaa64409976f4/45371990998.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfbb1b4ae3---27088165256.pdf
    • https://bamor.org/userfiles/file/jufanema.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9f46ac6c2---55632477577.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL
    • 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_off0000e6cf.bin
ccda0d680419d90d60eb803b4a4bf44a33482fdad8038ffa6c7d8e031f5e7f45
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CF 5280 bytes
font_01_sfnt_off0000f8bd.bin
07b5c32af3433796ccaff31cb3080503bcdc6f31959e88f8ab673d50cdab6d90
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 12728 bytes
font_02_sfnt_off0001214b.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
pdf-font-stream PDF embedded font (sfnt) at offset 0x1214B 16204 bytes