Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62008641d8bbe92…

MALICIOUS

PDF

103.9 KB Created: 2021-06-25 21:38:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d3506cc53e690a8d769f3b4b29fe4a6e SHA-1: 92b4c8d365902844fb8618c39f667dd63307d745 SHA-256: d62008641d8bbe9291c9fcc18ff50133bd891ecd774fd2f2dab5ab76aee50a5b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, indicated by numerous links pointing to external sites. Several of these URLs are hosted on compromised WordPress uploads or disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9689

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://queure.ru/uplcv?utm_term=application+of+derivatives+class+12+important+questions+pdf
    • http://andlupa.com/userfiles/file/wekunumitanasoxitifis.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e431ee3b5f---72619049946.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079d17d8b346---vufetolikaxibik.pdf
    • http://paradisoseminatrici.it/userfiles/files/9564985885.pdf
    • https://ludifrance.fr/userfiles/file/wudemubowodeparujibikazi.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/ff3b5f42ea5775f2e0b60717a4e0b892/22621564891.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608629c42b0a2---xumazalepufujatovin.pdf
    • http://youandisagenix.com/ckfinder/userfiles/files/35162128134.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/6b7ad3a789202a0f4c50d74c9aa9c909/midizuwurujejozuzi.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a72ef54ad63---74730332590.pdf
    • https://eitmedu.in/ckfinder/userfiles/files/luwijadatizonalabefumowa.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/e1e30210a686909ab5a590567cef9a0b/28046784759.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e64c6ca647---revagibidadugudotejonux.pdf
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/05a6q7670k4brapptko9tpphpk/fovebi.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/nhbp9ncscuf7dpeobahbl72ki6/vafagipupato.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092b2f9c4df7---wazigamogavevukupe.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/6a9d3cc959c622e795bb555cbde9fef9/nofovupobelesopotuxom.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/bfc4b8aa133f3c638407f8fe0ffba086/64087968069.pdf
    • https://china-glass-mosaic.com/userfiles/files/20210625_042815.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071258046e5c---99103370400.pdf
    • http://totaldeliverancecathedralchurch.com/clients/2/22/22dae496a1749ae881e6bee195142b05/File/31203672805.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a544f4babe---kuzaganesukefawufim.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8c94f0839---pusemomejavukupine.pdf
    • http://vitalbafitnessclub.eu/userfiles/files/javunefixotaguwimetobalor.pdf
    • http://toyteepee.com/uploadfiles/file/210604045708718500zl3r7l.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011261.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11261 16792 bytes
font_01_sfnt_off00012a78.bin
9d4212edb0745fb03340197a9b86c1d32adf92400655d7e4afe6c5a3da40f0cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A78 11248 bytes
font_02_sfnt_off000144cf.bin
9ddf9e67288e33b74420492634a5a9ada71af5b66cf386bd5c6eb0b700faec80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144CF 21140 bytes
font_03_sfnt_off00017b9e.bin
5f2a87ed485690ae99dd00ffd3dad57dcaf6de75c4981ecbeeee12bb760f3f7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17B9E 16144 bytes

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