Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e490ce39893a1d…

MALICIOUS

PDF

80.6 KB Created: 2021-04-08 16:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 646a1412010f9266ed5f562f2d3b5b88 SHA-1: dc9fb45b8d7ef549ca1fd3a2bb43491550f69ef7 SHA-256: 44e490ce39893a1dfff680d93b298397a95ebd0c5c14f6699259043ffa618dde
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or scam campaign, indicated by the presence of a large number of external links, many hosted on disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs likely serve to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=how+to+set+honeywell+rth2300b PDF link annotation
    • http://help-feedback-amzn6.xyz/how_to_make_hard_boiled_eggs_in_a_cuisinart_pressure_cookergc8d6.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/lefeberaxujivun.pdfIn PDF document text
    • http://wozuxel.getenjoyment.net/wakavururuzegi.pdfIn PDF document text
    • http://help-business-media.com/57144078584kfeev.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/99604420363.pdfIn PDF document text
    • http://vulgargirls.fun/bojoxodedekakknd84.pdfIn PDF document text
    • http://interbank.link/carmageddon_2_windows_7jkqc6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://7d7e9a41-1eea-4c72-a0b8-c0e3d642de37.filesusr.com/ugd/513cfa_0473cbe3bc254ff49bedbbd6fc767a24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/50b1fc26-95a7-4142-9ce4-5e8e25cf9098/nj_realtor_rental_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c7007cb-1ebb-499c-9d60-c9c3d0eaecdc/how_to_make_easy_wine_rack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a99d931a-4c88-48cd-bfcb-6bfe243dffc9/4527357254.pdfIn PDF document text
    • http://pumajamidu.rf.gd/55938118434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0926af42-20fe-4356-abce-176ec9971073/home_zone_security_led_light_3000_lumens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e33c293-245f-4da7-bfc7-a4d54538b7b3/45428072403.pdfIn PDF document text
    • https://90e68d66-75cd-4f9f-aa76-03b1e6b67b4d.filesusr.com/ugd/324cd8_516998cca12b4d06bdf8a797c46ba752.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdcd7e57-32af-494b-8c34-3bedc03ee3c9/what_culture_means_to_me_essay.pdfIn PDF document text
    • http://bibubojudij.rf.gd/noxumorevububelunofakib.pdfIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_32f448c0028341fe9f3a13b684966c94.pdf?index=trueIn PDF document text
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_c40924fda0b645179f3b509a7981a518.pdf?index=trueIn PDF document text
    • http://pitikepaz.epizy.com/taxero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb5d48a9-7a6f-4ad1-8326-55eddc3ff705/14817221788.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF4 5036 bytes
SHA-256: f87be6132bcf2de719889980a51fbdea45b9613b04917007f542eefdde179ba0
font_01_sfnt_off0001010f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010F 10500 bytes
SHA-256: 6ab821e061be1ec4ddf6428398872988916813ac4d66f0b256742174866b1de9
font_02_sfnt_off00012501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12501 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230