Malicious PDF — malware analysis report

Static analysis result for SHA-256 059c6bb3a39d20c1…

MALICIOUS

PDF

90.1 KB Created: 2021-07-02 15:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c0ea605724a61a8507117fe15a9e956c SHA-1: 5f9e4b0d23e8dc830a0c5a6e5ad17d6bdc16cb79 SHA-256: 059c6bb3a39d20c12ef9fa1e38ef134dc5bfe4e95626e81ec2e913c1334e33ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://aweibel.com/Photo/file/rorefinarivuwiriwemorixi.pdf
    • http://gilendor.cz/userfiles/file/rivubavarilixopideluva.pdf
    • http://verduciautodemolizioni.it/userfiles/file/16572931925.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/10fb7508af63281cd4f6d5040920604f/79263800361.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a20a8935981---nubelitigifilodon.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/fuxowesofiwaritudafitati.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/35900a59ebffe266d941c1f3bcc7797f/85403744632.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55b76cba03---wijew.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d93053cccb---73303984836.pdf
    • http://yuemeism.com/uploadfiles/files/26519350020.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160775f3679fe1---giredejuwarenolapovava.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/839307b2213c0656655e266e276eecf7/suduwiz.pdf
    • https://anfauglir.com/images/file/bigan.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085ef311af2e---kitiw.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d7112ab5a---55494147644.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88f34a5a4f---37866331548.pdf
    • http://tubietelbar.hu/uploadfile/32320369806.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3ada00809---20387296700.pdf
    • https://ahreco.com/uploads/news_file/lupigozawujorojoxalifomut.pdf
    • https://activepymes.com/pub/file/fusujikejarerugoxunovarat.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99811b019c---fovolufaxubevu.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cc6e10ea3---lesalupatapisuvobe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=september+yearling+sale+2020
    • 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_off0000f9e6.bin
01b1b750a001c9284b9dfb513fd88d11f500d9da7189c851198d9630e48c935e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E6 11048 bytes
font_01_sfnt_off00011370.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11370 16792 bytes
font_02_sfnt_off00012b82.bin
b4aa3dc0be671ad06c4f43dd45c5f82305b934b78dbde9872761c382f65e90fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B82 18112 bytes