Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a0e3af574fdb4d…

MALICIOUS

PDF

72.0 KB Created: 2021-06-18 21:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27b5cbfe47e9424e0f4afc05db294158 SHA-1: 7a4cd2a29377a28cc9fd5dd6bc4b0b714d264b29 SHA-256: e7a0e3af574fdb4d457e5975289a7e05ad94d9e8a4cffbf7635799a2bd743d14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malware or phish for credentials. The document body, though heavily obfuscated, contains references to 'Photoshop crack 64 bit', reinforcing the lure for illegal software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c731664804b3fc6a00ade329bbb1bb85/puzivujukusewar.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c3e45aa77---padutavevuk.pdf
    • https://hosvagyok.hu/userfiles/file/belukexelele.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/dff9a9abb06e96bdb04458c9cf758d1e/55003743405.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094cfb2ee7cb---dovejeveligobado.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aebb2a1ceda---fewerod.pdf
    • http://sweetbasketsbyjackie.com/clients/864293/File/fusulasodiviwobovigavoda.pdf
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/0a44c5cc7c21e910d4c8baaa38edc633/vasemukezemugifoxeno.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/q1icnjfqnv0c2eqvok28flbemh/felek.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6023ed4a79---67947994730.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/mih4g8i36fb9v0uqh6dp01qs0l/jijixexajezepekuv.pdf
    • https://catbasailing.com/upload/fck/file/sutibexemisijowapopig.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082bd91326d0---29258082545.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/brqibk0f93v16nv6nsogh3vp65/kedebo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=photoshop+crack+64+bit
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc17.bin
3a5dfc5cb56f3bd86be9afbd39cf52d084b7d6e067e3a462d805c8c14c5b0978		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC17 5436 bytes
font_01_sfnt_off0000ee8d.bin
3416f8c8056db47a10dda04697030eb904dee49c91ca63c9e5539f4059a8c665		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8D 10828 bytes

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