Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e74e9a2f87cc5f…

MALICIOUS

PDF

92.9 KB Created: 2021-07-12 23:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f2d3d6928c03d4e20a7f75fdd4bcc9c0 SHA-1: 9c527c97aae95a06a4639f6a61650fc33619a3fb SHA-256: d7e74e9a2f87cc5f6fb0889b838c973ff603aacc03d346855c2590c8ae0432f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing to multiple websites, with several URLs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and numerous external links point towards a tactic of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://iuoshili.com/upload/users/files/magidatumijexajez.pdf
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/63504668519.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0a850c8f4---lutifitomurino.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/25bec87903e2be8c32a107b7b429a0a9/45204091113.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/i9t5f5bt9onqkdjes0kummt063/52225290273.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d1e8c94a03b---tepag.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/0d312e7025733beed112d5c3895c58f1/27049986745.pdf
    • http://cmepta.com/clients/7/74/74ea2f63c40943e6497cbf70acaf7c81/File/99457148432.pdf
    • http://www.look4job.gr/images/_user_na/file/42890075908.pdf
    • http://deurenhanger.nl/userfiles/file/nosenoduwebolokixi.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ff4f77b70---5387541094.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/21277d1f9de47d5ee9144e21b4b8b678/vagufoso.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/29j5cncpnosqe5gk8dgibfp3b5/pogezedojatilejigunejeka.pdf
    • http://ahlhy.com/uploads/file/271552202295.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16082681a80be4---76355225769.pdf
    • http://pobierzplik.pl/uploads/files/59283043570.pdf
    • http://www.sport-konyv.hu/userfiles/file/nubovesotovekevewizekoj.pdf
    • https://eletvital.hu/uploads/files/70054190233.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d7f90d9ed08---ledexosefusupotajanetuzu.pdf
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/cbb9a66c29044f05a7210b5e6634c8c0/tixadenonupo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=dermatology+questions+and+answers
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001058d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1058D 16792 bytes
font_01_sfnt_off00011d9f.bin
7bdd2e2549d5ee88a96b9768a80fea95f28a885e80f9f17459d65dbd593472a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9F 17800 bytes
font_02_sfnt_off00014ba8.bin
6eb349ac1a4b7abc9d5c42c319acae1ad7727f48ae650e3a31ca9545a78934ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA8 11036 bytes