Malicious PDF — malware analysis report

Static analysis result for SHA-256 c368935225ff4ff3…

MALICIOUS

PDF

69.4 KB Created: 2021-05-11 01:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 624b31f9b805381dfb10bc8302e30b34 SHA-1: 6adcfd5ba43282719e17378dcfa4a9f32e76e2cf SHA-256: c368935225ff4ff3ef1920c058b25f765b790d9f95be39e9a8d7248d10cc0cd8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious sites. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates the presence of commands like 'powershell_script_not_running.pdf' and URLs that suggest an attempt to execute or download further payloads. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://jottigo.ru/strik?utm_term=hp+5610xi+ink
    • https://cdn.sqhk.co/wosipuvetot/vyhdifV/learn_android_programming_language.pdf
    • http://topsalon.xyz/cub_scout_sign_in_sheetuaqaq.pdf
    • https://cdn.sqhk.co/niporatibu/xjb9Wjf/78156378711.pdf
    • http://digitalmedialit.com/matlab_for_dummies_bookudxra.pdf
    • http://milatepe.medianewsonline.com/the_matchmaker_s_replacement_book.pdf
    • http://xunopapazugatar.medianewsonline.com/sawisiluwebejopas.pdf
    • https://cdn.sqhk.co/nupasoxure/gdhghg4/ordinary_skincare_website.pdf
    • http://erogancolumbia.site/569025965365a9vu.pdf
    • https://cdn.sqhk.co/jifibipex/iemkG4f/avg_browser_fast_browser_vpn_adblock.pdf
    • http://xeratigike.medianewsonline.com/central_motor_vehicle_amendment_act_2020.pdf
    • https://uploads.strikingly
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ba071fec-7728-4223-a209-79cc01b790ac/why_everyone_should_have_a_pet_persuasive_essay.pdf
    • https://uploads.strikinglycdn.com/files/3834ffe0-7bbd-4d05-b138-4a539b7533dc/niguguwojiwibevataloro.pdf
    • https://uploads.strikinglycdn.com/files/70292094-b723-4c5c-8caa-b3172bdd92d0/what_is_depicted_on_the_shield_of_achilles.pdf
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_0237bbb20805481ea26d796ac9c6c928.pdf?index=true
    • https://14319df0-7947-4f0d-bbb3-eaa17d5eb23e.filesusr.com/ugd/c45f38_38d4e1294428483c89fd47c02860b39e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5a995d70-a9f2-40b7-a5e5-44217f4016b5/37698072742.pdf
    • https://uploads.strikinglycdn.com/files/51de9fc5-4eba-49cc-8ec0-060e86d8ed95/south_school_love_story_movies_list.pdf
    • https://uploads.strikinglycdn.com/files/d6f27c08-5f3e-467d-b635-f50986c55797/windows_powershell_script_not_running.pdf
    • https://uploads.strikinglycdn.com/files/2c620965-1cb9-4bf2-91f8-26a8f24c2302/sosijanojizizig.pdf
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_22f3906531b2427e8376bdedd352fdf5.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d17f.bin
3a853ce4e28f4cadaef1e0e331b12e059dc89673d2d58c916eecfc7226b48bfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD17F 4860 bytes
font_01_sfnt_off0000e231.bin
9df705e8c2fe8087f5abea394bf30071c8aa8f2c599d7895fb11eab44c80a59c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE231 11348 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.