Malicious PDF — malware analysis report

Static analysis result for SHA-256 74417e6444ea0ae4…

MALICIOUS

PDF

90.8 KB Created: 2021-06-27 01:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f06c7d6b6b01a9824107f7148e5380d SHA-1: 0965e9983d5b31e6e8e5d40fd90d8f3bee633704 SHA-256: 74417e6444ea0ae4b8981bfe5bd8bf9e3599810014235b2437cdd5c2376e43b9
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially harmful external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 5

  • 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://medvor.ru/uplcv?utm_term=cheat+sonic+forces+speed+battle
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/efc12129128e5a3dbc0f16d44a833099/kuxukumoboxugozikirojoz.pdf
    • http://cukiernia-waltar.pl/qcms/userfiles/file/rikabunivixinavo.pdf
    • http://autowagon.it/userfiles/files/99737664618.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/635v6u98ugjgcqirbep5gu1egt/gilukuzepupoxujo.pdf
    • https://aneri12.eu/res/file/26389352763.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d91a03fcc1---tudafaxajidakekironunitup.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/c8b45d02af5044b9e50f9dcc128bebc3/pixavesexufexuwexiw.pdf
    • http://tvtamminhphat.com/uploads/userfiles/file/getazisevudem.pdf
    • http://kotolantopeni.cz/file/8445876772.pdf
    • http://rymwid-training.com/userfiles/file/mujugimenorutopexiwodari.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7defee609---13542674505.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ca9f690ccbb---88401879283.pdf
    • https://cncunse.com/d/files/lenujesegemolojabop.pdf
    • http://cariboohose.com/userfiles/file/56423663302.pdf
    • http://antifftech.com/uploadfile/file///2021052503214410.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/cc5b89d83350c5445665a8557929d35f/jevuperor.pdf
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/birikamesekigilodebimate.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce1776e3ed1---dubolofovuxobusofizomaga.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b256433f37a---20989262009.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/4644a3a47db391fd178a262bdfeec73d/95560320818.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/bfb2b47eca932e6fec40f5579a935443/83668790906.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22d9fbea8a---zomulorugedaralimu.pdf
    • https://amblamy.ee/upload/file/55988645017.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/uojj4389f949g69hsfkh13alt7/rajobosif.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec1.bin
a683f792cc0d4bc0ea93e7400293c590e91fbaf01ec55a580441dd9dca201d5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC1 10888 bytes
font_01_sfnt_off000107aa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107AA 16792 bytes
font_02_sfnt_off00011fbc.bin
fc2c5d5650d7959e769c81d9412de6fa750c6162de9f2e5bada759df71d8d033
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBC 18580 bytes
font_03_sfnt_off000150f4.bin
a2ed4df19203ef17e936e6b7b63d144ab0fe523414ba0c55764e6cbc548a1e6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x150F4 2928 bytes