Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabb2b905c9b166b…

MALICIOUS

PDF

88.3 KB Created: 2021-09-07 14:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3c4e96978d254f51942a265d4a8ef388 SHA-1: 6b4132cc51a14e282ab59ce3b8f1c8e4765b25de SHA-256: eabb2b905c9b166b1bbd11adeebfa2644b1652a784629fe870c012d8a7085514
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple compromised WordPress upload locations and disposable hosting sites. While no scripts were directly extracted, the nature of the URLs suggests an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f91402f05da---sesobopaguvesewofuzi.pdf In PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/5dde928825f3987f2cae3b3d79d81442/16977027317.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af1331c823---dujapebalijap.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094e3ce3f708---buwudimokekabo.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/17566774632.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98feedbb4c---67917933275.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f94adc2da2---22879426828.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/robozewinaxeza.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/lerorijomefusop.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/7ed9791434132396e63ffcbbda0b365e/60262946550.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/nalanixo.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/tipevuxikuzurisaxifigewad.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/femukonoxujavutuliweketup.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/fixol.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b0837bb5f9b---figeleperujed.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021083123030973499.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/083f52ef3f52731d773c165a5f15f739/93793881810.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/kebibumajamasabetis.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/fegidujamaxomafazusolavek.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/9558322780.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/posemokexabotal.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/netefewifajeraxuvugose.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090189a13147---nelomokawogezaxelubele.pdfIn PDF document text
    • https://network-italia.it/file/pesigimaruk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=harga+nissan+march+manual+2014PDF 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_off0000e82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82F 22848 bytes
SHA-256: f472f142ecdf65799e6ed406cfe845e8167cfd084a4ac02676127e7cf2d6ea4e
font_01_sfnt_off000122e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E1 10792 bytes
SHA-256: dbee88333ca835b5bc5636aaff3f278db09359e6a4b7c0fb6a71452b60856e86
font_02_sfnt_off00013b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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