Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7501938e72884de…

MALICIOUS

PDF

83.7 KB Created: 2021-08-30 10:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 652c4b47b4776c58f42f952418325897 SHA-1: 60420dcbf061a2e532a45da1f73039cf556d3202 SHA-256: b7501938e72884de34c6e11fb239cbdf7913efb284d18517edc74a54f1c46ea9
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded URLs, while varied, contribute to the overall pattern of deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c036ae900e7e49fef2b730f81d9dce92/5738734271.pdf In PDF document text
    • http://ukuleleceilidh.ca/clients/860383/File/3792526644.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/nopavoruwexugozeda.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/witarefadixuvage.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/4872733d016dd8b4686ca98cdfb23df9/22856422533.pdfIn PDF document text
    • http://terminsk.by/pics/files/rinob.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff6bb5377f---58782659833.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/momijawagamos.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079f7c068efd---40543493408.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/69ae7fb45109485de99bfd366bc8e170/21273939237.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/u91t5monbmq2t05h2dp713h65i/tadofewikewelolokat.pdfIn PDF document text
    • https://avflash.nl/upload/files/tugitunowo.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/99145245478.pdfIn PDF document text
    • http://workontext.ru/media/file/nekitoximijazafazal.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/bba0ddc5be01b2f179a71f6bb1c08a76/70247271879.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d74918e981a---taken.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/mgtdb2uchl1jcn0884ts1d2g13/vezegujavolunaputuzirale.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/l0akibbc0t5vren79o9s0b25hi/jaruxodirajebeleti.pdfIn PDF document text
    • http://dges.in/userfiles/file/20473964108.pdfIn PDF document text
    • http://magdrywall.com/project-new/christianbook/upload_images/file/bezuzafiwogegeguded.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c5479fc95---3136311451.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/61701218277.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/xigalixivoxujaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=1987+chevy+s10+for+salePDF 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_off0000e3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DC 10824 bytes
SHA-256: 648aa13eefb4c57a62ab7acf060a4bf861457a9c30c49dc1c8fff10d0a430b0d
font_01_sfnt_off0000fd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD27 16612 bytes
SHA-256: f0e7f43e9ca75b93963f13b4ed7a1c09f67c797e2ef9ef9ee5fd76b594bb0f8d
font_02_sfnt_off00012834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12834 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1