Malicious PDF — malware analysis report

Static analysis result for SHA-256 e016f20a90739d27…

MALICIOUS

PDF

83.2 KB Created: 2021-03-18 08:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 45941250c7cfa0d4d7ee6d4a8d29f826 SHA-1: d8e8a5a8151fc315dd53bf4f43e0dc3b6937704f SHA-256: e016f20a90739d27e29bea6f19f185ae5577d6a95e00befd6b9fb5d657db382b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware delivery attempt. The document contains numerous embedded URLs, with a primary focus on directing users to 'gimoguvi.ru' which is presented as a search result for a technical query. This suggests a social engineering tactic to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gimoguvi.ru/strik?utm_term=what+does+e1+error+mean+on+treadmill PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366987/normal_5ff7d430210ec.pdfIn PDF document text
    • https://cdn.sqhk.co/femaxozimom/gmia8VD/asuran_mass_bgm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448992/normal_600ffb03e9a4f.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/callidae_voces.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444104/normal_601ccd1b4d09f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476925/normal_603dc1825afda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484107/normal_5fefd0a5a9b69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460983/normal_600e7c465f06f.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/87367966502.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/jhcWuVc/launcher_minecraft_mod_pack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374009/normal_5ff429beee3c2.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/counseling_the_culturally_diverse_theory_and_practice.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450139/normal_600dfde429ff0.pdfIn PDF document text
    • https://cdn.sqhk.co/timafewa/Maqidhi/juzasel.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://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_5736df17ca9547bc941e50ac83d01e98.pdf?index=trueIn PDF document text
    • http://xamukipadu.myartsonline.com/joint_stock_company.pdfIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_61055163dbef4999ae19ac625e6a2801.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75d8986-4b47-4ffa-88da-e0669258ddc4/how_do_i_calculate_average_days_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53669e4a-a4ea-4b83-9d8a-8b687f3bc546/nojoredinodobunoxoj.pdfIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_6902e5b7c09b4aadab1711de9bf2efaf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3417d1e-c6c7-443e-8983-b15db2eee536/tissot_1853_chronograph_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fae3b04-4305-4b34-9ecf-a823dde16006/36337645231.pdfIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_39062a40c62440dea89c7e63edf20a90.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 4920 bytes
SHA-256: e566f016e8d83432c0cd6c99653e12488d5c68e37f448269f163157b66288ae1
font_01_sfnt_off00010bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAD 10984 bytes
SHA-256: 46bfbbc780d0b2f9a1b6297811d98091848622579d4312c6732a01141990c3a4
font_02_sfnt_off00013108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13108 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71