Malicious PDF — malware analysis report

Static analysis result for SHA-256 044ba2fdf24a0bae…

MALICIOUS

PDF

85.5 KB Created: 2021-07-26 09:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a4abbb9257c5e973f7ebe3ce73f4bc9 SHA-1: 149f2db26bcb995071814ad2c4dc5e0558ca45bd SHA-256: 044ba2fdf24a0baea6504e6b978861cb57f8f0a99fe40acf2f9ea90e75d3c8bf
196 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the presence of external links points to an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609487a3c581f---wipisamotefu.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/029c55b3ae93aace5753886dc204224a/65195111094.pdf
    • http://brucemaymemorialgolftournament.com/clients/d/d2/d245e0393a5bbb16d67b82808c007790/File/jajuj.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/7f3dcf4a9759fcbadc3b9f3192811fc6/4724332482.pdf
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/27424445811.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a3f946089aae17e01802835a77b9d8ee/bodetux.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/jlmqib442jose8ip2c6g4ge1n1/47165451759.pdf
    • http://bensonlandscape.com/editorData/file/10249873975.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/85a0or8l8lup5cllbp2bcma815/98988943225.pdf
    • http://blissworldbeauty.com/newerac2c/userfiles/file/25148818341.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609072a8397f4---89592587007.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/ba6fa0037143b1f775d61d17f891015a/43842184097.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/259963e3ddf407c16918b26b7cf1d8fb/96674274859.pdf
    • http://architettoannalisatinelli.it/userfiles/files/64351886754.pdf
    • http://mid-europe-ex.com/images/blog//file/minukusum.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/cf11c33b1b1a2d4996140bd122a29e37/80848684662.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16075dd16f1aa7---gufuxaxajejapazow.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/nuqp102jcd6est3bkott2rpbrl/tiziwaxegijemexe.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609469e1188bd---34232614175.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/bf54c5b16340a6c27a46a636abc12528/putilegidujovasivokadigap.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082cc6072326---18463610634.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc13c340a---kofadegokujuli.pdf
    • http://www.contectrade.hu/fckfiles/file/52907533948.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=emerson+commander+sk+manual+error+codes
    • 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_off0000e964.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE964 16792 bytes
font_01_sfnt_off00010176.bin
12e3bbe8c7c2506f54e501c4032d0dd516f04a575169497b0b49d5d3fba262e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10176 16928 bytes
font_02_sfnt_off00012dcb.bin
60409b110cf8cc4df16f9fbd8a8a10639409ea6d81acdbdadc17ef5cd72b7d3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCB 10516 bytes