Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f649953d43cc516…

MALICIOUS

PDF

197.9 KB Created: 2021-06-25 22:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26ef7a36a6532429dc929fc950c19442 SHA-1: 7a7b7eceac0bfd820c2aa28c68573c98ff074133 SHA-256: 4f649953d43cc51611a81c3630df8f219f621418cfb2a4a01aae8e58b36b7d14
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded links, many of which point to compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users. While no scripts were explicitly extracted, the nature of the embedded links and the detection names indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9821

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/46ab6d223d54b309317b117537cd97f4/bitido.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de94316190---zetofu.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1735437af---tuzovoxofewalugitonalulom.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16095f49359b4a---zonijatutuwikojafozilo.pdf
    • http://wsp.pl/userfiles/file/zivijupasarogejewe.pdf
    • https://samsungklimalar.com/upload/ckfinder/files/41799586248.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607189d5d7b41---fuvijotofoxizusirume.pdf
    • http://urbanconstructions.org/images/uploadedimages/file/86021401153.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f523529eb---2864494554.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a42a917fe3a---45308927643.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607200f5da6c3---29759373279.pdf
    • https://angkoronetour.com/userfiles/file/37200365007.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/mohbhvgccvcdskcfsftgujrn6d/wosas.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1f5b1dffa---30274654768.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cb71509307d---depug.pdf
    • http://shinies.ru/img/lib/file/dotoxe.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/c0b2a0199ccb34b38ea53f60fe502c9a/buxifeke.pdf
    • http://derkwoo.com/upload/editor/files/93244709455.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/soa612gr7k2d64h35qsn9uq9i7/riwajo.pdf
    • http://oio.cn/uploadfiles/files/50904602766.pdf
    • http://afghansolar.com/userfiles/file/89257602385.pdf
    • http://porpora.biz/imagenes/imagenes_contenidos///xikajof.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d159b8ef84---basaverajaraxuleke.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=textile+terminology+and+definition
    • 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_off0002a60e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A60E 16792 bytes
font_01_sfnt_off0002be20.bin
8993d388f7fc36c230b2d22860493406dff96e440748355f7709c377c9564c1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE20 20084 bytes
font_02_sfnt_off0002f0e6.bin
603c8310a4ea8c500a11103326740bd9bbf7d05d66b5d379b0194074429f698f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0E6 10708 bytes

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