Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f48ed755b31d48…

MALICIOUS

PDF

84.0 KB Created: 2021-07-20 04:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30574fae42262b2d1a9d65d9fa4f28da SHA-1: f6444e461c765383b38e752060101bd9522b97e1 SHA-256: 67f48ed755b31d481509c7f9272d5f930deb51df6a3ac639161bd4da7946b3a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of external links and the nature of the heuristics point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/5bd4e8f0317eb6fbd2597e1c9963f20e/meletorekez.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/05fe54bd56bb9d5e3c0915dea8c72d0f/xetazenalufuf.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a483f919---fomavizorunaligoxekafe.pdf
    • https://akemi.ro/hirek/file/23712704432.pdf
    • http://alemotta.com/resources/original/file/23480413017.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ir7if2ui9lq339eva2erf6k785/bewumigumixajisubovupiw.pdf
    • http://shipsupply.ru/userfiles/files/14440038746.pdf
    • http://daindnc.com/fckeditor/userfiles/file/xejizudatebadajutovo.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160eca3006b5a0---75769321739.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c36dd3443e4---79098264473.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f4922f77e---3389533785.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/08o5cikq9de6rdedvl1lm050ml/35047272988.pdf
    • http://shadesvalleymounties1969.com/clients/868959/File/16218374891.pdf
    • http://pincailight.com/zk/UploadFile/file/2021070414235873499.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e7bca6d23---tejusiwa.pdf
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/wepexak.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3ac3bba93---40120178959.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/7e66804e763eb3c76998f500c623def8/59877368194.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/ebcnc19e599m7li14jggih323a/80855873438.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/85e0fd1612bd924c0fb3bccc2a91316e/22367750465.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdafe8546e---35227017808.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083f90124085---gejafaso.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/049353fbda0444295685f1d98680b54d/82587794078.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+remove+sample+watermark+from+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_off0000e587.bin
507621368b811bee3c79cf20dd9821847c206a445a32c6d8dd3094d9263cedf4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE587 17136 bytes
font_01_sfnt_off000111ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x111CE 16792 bytes
font_02_sfnt_off000129e5.bin
4fab7357d671f10dc78b57135b178ae561531f6665df1d07fe8e9cbe7c02275c
pdf-font-stream PDF embedded font (sfnt) at offset 0x129E5 10696 bytes