Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e79acc7238f3aa9…

MALICIOUS

PDF

97.0 KB Created: 2021-04-04 09:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fbb52233a72563c2e40f90662c518886 SHA-1: 2755bb9942637587d7be09c486257291dce71d96 SHA-256: 4e79acc7238f3aa91ebbeaa5d6cc51555db95a4a66752599354eeb678cda7065
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting or suspicious domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'auto click apk ios' in a URL suggests a lure for potentially unwanted or malicious mobile applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=auto+click+apk+ios PDF link annotation
    • https://majosipodolonax.weebly.com/uploads/1/3/0/8/130814003/2a13ff73.pdfIn PDF document text
    • https://cdn.sqhk.co/xivumatozo/gWbAQpQ/sql_server_express_2016_64_bit.pdfIn PDF document text
    • http://7evenrp.ru/les_miserable_musical_script653im.pdfIn PDF document text
    • http://buvosidif.22web.org/aimbot_call_of_duty_mobile_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/SiZidX9/best_business_card_scanner_app_export_to_excel.pdfIn PDF document text
    • http://chisto-chisto52.ru/211642903738cxlx.pdfIn PDF document text
    • http://love-your-lips.online/wild_magic_sorcerer_5e_guide22hi3.pdfIn PDF document text
    • https://cdn.sqhk.co/noligigibar/gH8zhh3/87544421083.pdfIn PDF document text
    • https://cdn.sqhk.co/silinetufid/bOXBji1/oceanhorn_2_switch_price.pdfIn PDF document text
    • http://hdvideo.design/ribemozited4h6nw.pdfIn PDF document text
    • http://parkji5x.xyz/guvutujicak1d.pdfIn PDF document text
    • https://fegedagupadid.weebly.com/uploads/1/3/1/8/131856554/riwamefomopefaja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e56012de-db2f-40d9-9f33-95b4b7089246/lebopevewexomekajopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf5c8fc-d376-43e9-aeca-057299ded29a/quran_in_roman_english_download.pdfIn PDF document text
    • http://witopovuketoj.epizy.com/25575780908.pdfIn PDF document text
    • https://c0e8410b-c394-4b36-8083-179878a46647.filesusr.com/ugd/d4b1dc_3d0ef78505d64778b356433d347896b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de7487e-0b8d-461c-9021-e1dd6478d11a/harley-davidson_livewire_battery_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d0ba6a2-0d31-4086-ae78-a4b81f4f972a/walmart_photo_gifts_promo_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bf7bc2-1939-4914-a6b7-ce7ecddf7822/88609103373.pdfIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_6c1ee7443b69454cb82b8e34356baf54.pdf?index=trueIn PDF document text
    • http://mutelikatiseza.rf.gd/34189589463.pdfIn PDF document text
    • http://bosotosevizava.rf.gd/bf_skinner_beyond_freedom_and_dignity.pdfIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_7b283bd105d84f5da17d8c732e861556.pdf?index=trueIn PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_8cd4930dd739409b85facf38bfefd5fc.pdf?index=trueIn PDF document text
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_b7e014b0e92740079ad27c33699cd379.pdf?index=trueIn PDF document text
    • 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFC 6588 bytes
SHA-256: 4e1a9c4cb32f1bc4ff176ae4dc1460c31b2d267bf2def0252f23ad2731e7be72
font_01_sfnt_off00011f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F75 4884 bytes
SHA-256: 2c89df8864fdf43924c15dfa39392f1456a41a2f67cfdcb82ea009dc134db2e2
font_02_sfnt_off00013022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13022 1936 bytes
SHA-256: 21a7146106e2ad29a4dcc6aa55cee169416400570e2b3d493b6d071cb256f2f3
font_03_sfnt_off00013964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13964 10784 bytes
SHA-256: 0850a1551d8468872de3965a76916dffa947e68b5b8a759a124e0963016437b5
font_04_sfnt_off00015eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EAA 16168 bytes
SHA-256: e5458d7b6d82539349b17fc4713a17e1381d471255c72d9f8116b7c86e08c443

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