Malicious PDF — malware analysis report

Static analysis result for SHA-256 047603e42a75eeb0…

MALICIOUS

PDF

88.9 KB Created: 2021-06-28 19:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c4078e422fa0bbf48d3b2b2cf0bb0959 SHA-1: c4442ee54242d0c3e66995ebd494b54fb8c9dbc1 SHA-256: 047603e42a75eeb0bf235010a9c0d57fe9413921db5d536852a4e45225836890
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of a 'download button' heuristic further supports a deceptive user interaction workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=ghostbusters+2016+full+movie+in+tamil+dubbed+download
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/6261bb08d3f3b8d98abf663de7b6002d/55169975164.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/32e284ea68f3b9aa1dc0f20eb595d02b/67262407539.pdf
    • https://fotobolfestmeny.hu/mvc/userfiles/file/rorefekugaje.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f28b220641---95524035319.pdf
    • https://designclarf.it/file/mewemerugurog.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607918e65c9c8---31083979548.pdf
    • http://kaithompson.com/userfiles/file/wuwogopisepurebasugisanol.pdf
    • https://edusfera.pl/upload/file/8736793120.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/de0a181346da66a96cd9351a8fe035bf/53671219945.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e1b02b7eeb3e78628d78c556b1d77298/zitotesebotapizemamerefos.pdf
    • http://aftckwt.com/uploads/file/33114545550.pdf
    • http://jar-ted.pl/file/30788063448.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2a3cf0a5e---dilikabepiwudanapava.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb820c6927---nakewedaw.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/65a264e9f247b04905134fcbc6743062/komopedexejikilal.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16090e0e38d8a9---bitix.pdf
    • http://cuacongtrinh.vn/upload/files/xodidivuzabor.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/3d34a58261506a6f0d794827312eb2df/gipezux.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ab33bc4c97b550642a7027ff75379d9f/62034853453.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b7afecdf1a0---sonorovekawuniw.pdf
    • http://bjhtdszdh.com/v15/Upload/file/2021531643556817.pdf
    • http://novussiteyonetimi.com/uploads/file/74002677233.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caeba81ec3---ziberevivunitexatak.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/b93e88ecf1d3adea1fe2ba7692db2d81/gasafiwetadazoruvul.pdf
    • http://nickels.design/ckfinder/userfiles/files/8673547785.pdf
    • http://beiwendq.com/userfiles/file/fafijojumegiw.pdf
    • 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_off0000f657.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF657 16792 bytes
font_01_sfnt_off00010e69.bin
e38081e4a5a2d3524813d9ee211ee83d2bbcd021cc70b0367a7ad4e52d1efdbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E69 16920 bytes
font_02_sfnt_off00013a72.bin
ff110faaf4c994821d27e62bb5896a04bd3b28edbef1dcbcc54aea67f53d2b6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A72 11512 bytes