Malicious PDF — malware analysis report

Static analysis result for SHA-256 09765abbe79c3e6d…

MALICIOUS

PDF

82.1 KB Created: 2021-08-26 00:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 2a0553dca858ba6a2e70be45785719d3 SHA-1: 4e01f2d1919c8ee890732e5e5be647fb26a0829a SHA-256: 09765abbe79c3e6d3b8f0065e051edaff6100459b0ffef2a9595031d6288b0f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains numerous links to compromised websites, suggesting it is part of a phishing campaign or a distribution point for further malware. Although no scripts were explicitly extracted, the nature of the link farm and the detection names point towards malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://hanbangrd.com/userfiles/file/20210812225446_2034401829.pdf In PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/18341547982.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf09220794---pojenusatijoxusogewajodis.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb78614c1ab---99625319462.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106ab2f97ee0---zutofakamo.pdfIn PDF document text
    • https://cesiedizioni.com/userfiles/file/75090888306.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/107da8eca05ce60ece939848873ca98f/37152699984.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/63044655676.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/86b467fe47b01dbf3949f678bf6ad1fb/sorimawavuw.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/tidabugifidejone.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/nepemivelefudopojenuselif.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/4878990228.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/a56776fced6769b3248a5cb3bed44aa0/fewupalixulazuvusuj.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210705114715.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/d98c07e410fb915c1c09ce9bd025dfa4/fixaziduruwokefemisi.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/5f7b2g66d2licnl9k4j6sok591/83145935182.pdfIn PDF document text
    • https://ajambary.com/userfiles/file/zavejukupimifu.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/0b208700d6520b1858ffe7edc6760e7e/vevovufesosolid.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/dokimuxezowedesus.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/30021959266.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ae054ac1f87---widoterezakadivubata.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/xugojexabojomuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=erosion+cost+definitionPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE016 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF828 16416 bytes
SHA-256: ae6f7d2728218bbb7c9802f2a9f02b361b96002e770bbff4658979e1cf5d7c94
font_02_sfnt_off000122c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C2 10244 bytes
SHA-256: 34fb2163360c7da7f6b899b2e7af966b8e6c0aaf4aa4d9a81a17e8e1f8a0b86e

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