Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b29c18b2c9d3e0…

MALICIOUS

PDF

89.3 KB Created: 2021-07-07 11:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a0e167faec9f60b53e8cec563d6198c SHA-1: cc7a33bc55cc80c9b46311e8686f545ec6e2d34c SHA-256: 01b29c18b2c9d3e0772955b0768e08ad66008aef18d240c941c788f767df82b5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains embedded JavaScript and numerous links, many of which point to compromised WordPress sites hosting PDF files. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to download or redirect the user to a phishing or malware distribution site. The high number of links to compromised CMS uploads indicates a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://a-swiss.com/upload/userfiles/file/19939491336.pdf
    • http://alfavit.tv/userfiles/file/vabasefuw.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d67e7bf186---zinogusawujiwidol.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/3153debff11b3f21ed1e2d32e2c12082/99313560786.pdf
    • https://myphi.biz/nbloom/fckuploads/file/93502352765.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/5d7625cf41c5ffe2423e0536c3fd6bd8/95161057553.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/rpkiad65t9ill65998nlemfcjm/40032878661.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608955127f498---jisatapen.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160c92f6c24598---58122435145.pdf
    • https://iva-vietnam.com/userfiles/file/turowutoz.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/e5e2e746f7228ff20d6dda5789ed406f/67844600643.pdf
    • http://yossy.biz/userfiles/file/15291459808.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16080f7754b944---risojojafonek.pdf
    • http://baugeraeteverleih.de/benutzerdateien/favopobaba.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1031bc2af4---55027363520.pdf
    • http://anchor-m.com/js/upload/files/komidamujat.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608183ff8dca2---nababafotuxomamemuv.pdf
    • http://stardentalcare.org/userfiles/file/zazomudojokejuwepi.pdf
    • https://akapacha.com/userfiles/file/xolid.pdf
    • http://yakutiaprime.ru/SITE/files/editor/file/43024820350.pdf
    • http://designpavelzapletal.cz/files/file/kodikaveganobenegebute.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=absolutely+true+meaning
    • 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_off0000fc18.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC18 16792 bytes
font_01_sfnt_off0001142a.bin
10bb0c1e78cca835f5a6e7f5e81534e35f82c9d2be4f5405948ef0768ce11b95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1142A 16660 bytes
font_02_sfnt_off00013f51.bin
66f0c32b3cd16563a78b6f973e941ba9f280ad1aac4fbcabe70e4b41dda7f2e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F51 10784 bytes

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