Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed509b88f712189e…

MALICIOUS

PDF

86.5 KB Created: 2021-06-30 07:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0defd50ffb520c23201be9b57779a98d SHA-1: 8299175e4179812cf7ba0f4e8dd733288d37967e SHA-256: ed509b88f712189e3fb689906228940088762131e0dfe033a2cd95a8b685b9b1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious File

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a tactic to host malicious files or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL findings are sufficient to infer a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=mbox+to+eml+converter+online
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/2p8b6lju6eb31aarr6ht01asdk/nodogugufujogomori.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098ae7130f5b---33234476369.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/acd3ec067063e29837ad4c457518acb4/dapegibegisob.pdf
    • http://psychoterapia-przemysl.net/img/userfiles/file/90331162180.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/dgv97n5eopcdcp79bl68cqg261/dokawiku.pdf
    • http://pappteam.hu/userfiles/file/52486706263.pdf
    • http://budohurtsa.pl/userfiles/file/28033589020.pdf
    • http://cropscipublisher.com/files/upfiles/file/70461805558.pdf
    • http://skolicka.eu/foto/images/file/lukaxalabiwezozep.pdf
    • http://nicenpos.com/userData/board/file/toxoduwa.pdf
    • http://parbatsamajjapan.com/img/files/files/45039694422.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/s2k19fkurjps6vmbbav8vu7i54/54752954811.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/cffe30b68aaad979531742b473481183/lojelijavafurije.pdf
    • http://opuspoint.com/ckfinder/userfiles/files/naxewejafewenoruju.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160db8c57ada91---resibakewiviridu.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16091e06e9b105---90470201669.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/8fff41a79ef9933b4732235b21b5a7ee/18853978301.pdf
    • https://austarpharma.com/upload/files/13764601423.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/nakro3i7bqqs7i6ib9frivknm3/59313807979.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071bcbbf1289---parowalup.pdf
    • https://abeess.com/userfiles/file/rupiwamaliporeredunuje.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/3fae5829ba49f3020d82ef76bfcf3f56/45283175453.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea74488e03---nudujowa.pdf
    • https://tractorpulling-emmeloord.nl/upload/file/gisaxukukakafulexefel.pdf
    • http://marcobernini.it/userfiles/files/9480666066.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899d0773fe9---91345402741.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef0a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0A 16792 bytes
font_01_sfnt_off00010721.bin
11952c9b154ebcca1e91a78a60b3000756ea8536aa3cf79009771e4432fc4190
pdf-font-stream PDF embedded font (sfnt) at offset 0x10721 10360 bytes
font_02_sfnt_off00011e80.bin
453d476651b425ee59a93b275d1e31e04035424e41b26859578f6d36a70222e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E80 17592 bytes