Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0f001bcbd0da19…

MALICIOUS

PDF

83.2 KB Created: 2021-04-02 22:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: db25617f8ba6211e21ef16361c662933 SHA-1: eda21a505b41d9e05f1e85f24c197ffc482254da SHA-256: 9d0f001bcbd0da198a923ef9dbd9681dfd71f70e845c4f40914eb86358ad2b1a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with https://dugedepap.ru/strik?utm_term=what+were+the+main+characteristics+of+romanticism+and+realism being a primary indicator of malicious intent. The document body is heavily obfuscated, but the presence of external URIs and the overall heuristic firings suggest it is designed to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=what+were+the+main+characteristics+of+romanticism+and+realism PDF link annotation
    • https://cdn.sqhk.co/sozaxejiv/gVS7ggC/rarodekigetexivixi.pdfIn PDF document text
    • https://cdn.sqhk.co/mopijiluxu/hcgdhhZ/45562413634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_604134082df25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374013/normal_5fec311b92ec3.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/pamemoxemukagogexa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426696/normal_5ff1db315206b.pdfIn PDF document text
    • https://cdn.sqhk.co/nanubebebot/7o752jd/59435804690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_6039382a8f473.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385869/normal_5ff5ef79271d0.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://uploads.strikinglycdn.com/files/aad3f537-46ac-4b91-bdb3-040e30ef53e8/how_to_start_troy_bilt_squall_210.pdfIn PDF document text
    • http://josuxak.atwebpages.com/christian_baby_girl_names_with_meanings.pdfIn PDF document text
    • http://zovebosovu.rf.gd/95922412672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236acef1-36d9-46d6-99ea-6f9e6da85fc2/zoletis.pdfIn PDF document text
    • http://mibasekivutidel.epizy.com/what_are_von_mises_stresses.pdfIn PDF document text
    • http://rizexabidi.rf.gd/zinatupuvit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/478efb52-edfe-4483-9e5f-ab6ab4e95243/6042913567.pdfIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_edf066fa9ff04018a723253ed2705739.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e98963-09c1-4fbe-98ed-914d178dde5c/lelufusiwotaxupusafofo.pdfIn PDF document text
    • http://lupipabibokaf.rf.gd/example_of_accounting_information_system_failure.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_fd5c8796b64b4a7fa190a41d5b0ca866.pdf?index=trueIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_0c3a6ceeec3a49408264d1329fa3c1cc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c666d8f-b4f5-459c-8856-cc211f770079/sigelei_150w_temperature_control.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_off0000fb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB35 5156 bytes
SHA-256: 650a1fc4525d5319d7de4d990ac551b8a763c4c479562494b52ba1ddafbb7ecb
font_01_sfnt_off00010ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA3 10456 bytes
SHA-256: 7c691e54c2b4ada84abbb85869a6a340bbef611c8730b374e0ec38774b7082e1
font_02_sfnt_off00013058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13058 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230