Malicious PDF — malware analysis report

Static analysis result for SHA-256 9946e842cd742e06…

MALICIOUS

PDF

98.2 KB Created: 2021-08-03 16:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ccb30be41688b7cb04d0d65a3720047a SHA-1: 6ace5d357380091d65980a219558a5ea6c5117fd SHA-256: 9946e842cd742e065679324390080891708366688405f5017a5679ed1a1634fb
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, likely serving as a distribution point for further malicious content. The presence of multiple PDF files hosted on these compromised sites suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9739

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 http://fipjp.com/userfiles/file/pibibiroroliratap.pdf In PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f6e7d4ae7---78992048502.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/v47034pi6mah777dr6fuqtuls2/61012000615.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/diwazuseledeperimefukutiv.pdfIn PDF document text
    • https://ijp2.com/contents//files/53093839119.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/62976893841.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160d03d4144972---zejivoraxitifibuwanupajik.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/guxopulonis.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/3147a541fd6dc94b584928d157627ec7/nawasepexexoperovokifir.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/971c263bffa71951c55cfbdb125829c8/punupovike.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/xukolu.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/diwosorigusasebobaw.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/5919e076de7eab8b71505e7ef11f0f75/zusafawi.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16094b9c99fada---48250659564.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/14dc01323cd61aaeead68a68958c28d3/ribuzirus.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/tumodumedifip.pdfIn PDF document text
    • https://ibericadearmerias.com/file/27822013265.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753b3cba150---92592124382.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/aba905a9610afa3a3ba6733827039fe5/77075143352.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/20812262210.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/73100629046.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52f13e92da---bufikufodozifeda.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/dd55cb2a11bcea97326cab3ed98b9041/nedivifedirunazapeviv.pdfIn PDF document text
    • http://abington1964.com/clients/865474/File/vesewez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+the+definition+of+aimyPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F0 1936 bytes
SHA-256: 0a6c986bc9586de60d373a0682586073d6620dd26c92c0cfa3ed004170860f57
font_01_sfnt_off0000feee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FF 16236 bytes
SHA-256: 584ce995500e8808a36599b580cd4265c6b64dc31926f2898f366057359e3a32
font_03_sfnt_off00012cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD3 20580 bytes
SHA-256: a6af0dac00dd155d3efd76a289859ce17152d6b7c1bed693b042287be5ea93c6
font_04_sfnt_off000162ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162EE 10580 bytes
SHA-256: 87ef78fb169161b7ff99622b309bac1071d2bce31982906f01679cc08728e225

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