Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c26825777b3080…

MALICIOUS

PDF

126.1 KB Created: 2021-04-03 13:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3e3dd72280327bfc9fd3aa318d0a52c8 SHA-1: 8951e87c6616f15ebebb9bfc043d4e230d9ae558 SHA-256: 42c26825777b3080ec014b0cd8f82ef2bca80742f884eba4f756dd02b3ffc62f
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified as a link farm. The primary URL, https://soxebez.ru/wix?keyword=sharp+carousel+2+convection+microwave+manual, suggests a potential lure for users searching for specific manuals. The heuristic PDF_SEO_LINK_FARM indicates a mass of external PDF links, and the ML classifier and ClamAV detection strongly suggest malicious intent, likely to distribute further malware or engage in phishing. The presence of numerous links on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/wix?keyword=sharp+carousel+2+convection+microwave+manual PDF link annotation
    • http://zugapuvu.mywebcommunity.org/babedowakemonuwisanaruzar.pdfIn PDF document text
    • http://majugulowoju.22web.org/puvagujibupijodaxen.pdfIn PDF document text
    • http://xalapuzim.sportsontheweb.net/dakelabipuvuzevoromex.pdfIn PDF document text
    • http://fionainthefield.org/junulodnwt63.pdfIn PDF document text
    • http://japarof.mywebcommunity.org/candyland_board.pdfIn PDF document text
    • http://temilops.xyz/iso_27001_controls_checklist_excelsmm3t.pdfIn PDF document text
    • http://visiblawty.com/i_pilot_link_vs_i_pilotaf8cp.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/cambridge_english_for_engineering_mark_ibbotson.pdfIn PDF document text
    • http://bitcoins-profits.com/shatter_me_featuring_lzzy_hale_-_lindsey_stirling_lyrics1rmt3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://relufojexoxokaz.epizy.com/bonfiglioli_vectron_act_401_manual.pdfIn PDF document text
    • http://faduribifojom.rf.gd/biasing_methods.pdfIn PDF document text
    • https://288dffde-0386-48bd-adba-b069b5f3b70f.filesusr.com/ugd/7e1b39_22b6cc1e597f455b964fae8fb41ae773.pdf?index=trueIn PDF document text
    • http://vezifapix.epizy.com/antivirus_apps_for_android_free_best.pdfIn PDF document text
    • https://ec560393-4650-4708-bf0c-d08fceb8458c.filesusr.com/ugd/ca69db_f94e81031078430da255b9ccd38bd041.pdf?index=trueIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_c4f6424a5ac94cea9ffe09b2d551bff6.pdf?index=trueIn PDF document text
    • http://merowijesajov.epizy.com/22634528570.pdfIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_c4644ffd51844982ad5672fa1acde5cf.pdf?index=trueIn PDF document text
    • https://34a711a6-6b77-41b4-a6d5-f55437226814.filesusr.com/ugd/c1ce8b_a48c8d6f74fc448884f119cdea0ca853.pdf?index=trueIn PDF document text
    • https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_339ea39794d1439ea6a5c349671d4a0c.pdf?index=trueIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_db484e0e04894a66bf445640aae17f3f.pdf?index=trueIn PDF document text
    • https://b5f62e6e-b620-4b0e-90dd-fa81fc7fb5c2.filesusr.com/ugd/18d815_06e23f5b87954dd0a1003164e3e28b2c.pdf?index=trueIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_a78013f537284617a52d4426af2d59ee.pdf?index=trueIn PDF document text
    • https://fea50346-ab34-4b67-843e-90a6383c4983.filesusr.com/ugd/bf678e_2fa66a4a5da240e6bc601436dc425520.pdf?index=trueIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_a06cab9d210b4b098b71a6ae6adcc40e.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001abf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABF7 5560 bytes
SHA-256: ff31681c928f203d3b4e808b6171529701114a08c2f3d1ae2410d4d659920d05
font_01_sfnt_off0001bec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEC8 12892 bytes
SHA-256: 8fadb011e076dbefb5e40f5ea2ae71bd8e6d223581b04d8bbc0257f997c14183

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