Malicious PDF — malware analysis report

Static analysis result for SHA-256 1007ef38856253c3…

MALICIOUS

PDF

89.6 KB Created: 2021-04-08 15:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 37eb24b9d5702da205f9f86f740bad0d SHA-1: d381c3b11eab7adaec112a6b5d5d8c792514d040 SHA-256: 1007ef38856253c333ade06aad3b813b38a4ba3c873c319d2a87273ee184c46a
166 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs users to copy and paste content into a command-line context, a common technique for executing malicious code. The presence of numerous external URLs, many hosted on disposable domains, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://baarspo.ru/strik?utm_term=asp.net+mvc+microsoft.extensions.dependencyinjection PDF link annotation
    • http://damvglaz0.xyz/29553172760xrol2.pdfIn PDF document text
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/kuxozurizojim.pdfIn PDF document text
    • https://mumifigade.weebly.com/uploads/1/3/4/3/134314269/8641779.pdfIn PDF document text
    • http://eeuuurrrrr.space/kewulafilutigubipabidpsc1y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410217/normal_5fff4c6c82397.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460058/normal_6009161f14d9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446374/normal_5fdb8a07ac4dd.pdfIn PDF document text
    • http://8bitbeardsco.com/unbearable_lightness_of_being_movie_reviewkphi3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366316/normal_5ff227787b9d0.pdfIn PDF document text
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/9638393.pdfIn PDF document text
    • http://kewatupu.scienceontheweb.net/high_achievers_b1_workbook.pdfIn PDF document text
    • http://vwwv-avito.online/us_history_questions_and_answers_easy70qom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476601/normal_6069420d6af6f.pdfIn PDF document text
    • http://xojanefod.mygamesonline.org/the_arbitration_act_1996_a_commentary.pdfIn PDF document text
    • https://zopamege.weebly.com/uploads/1/3/5/9/135966764/a035b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381529/normal_5fed773e2d2da.pdfIn PDF document text
    • http://ionatr.fun/770610422832vl14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465941/normal_605b67515f118.pdfIn PDF document text
    • http://redpandarecycling.com/pobeka7cx77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_60225204e88f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://radiviwix.onlinewebshop.net/47025809124.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001210d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210D 5388 bytes
SHA-256: 2efe8d69f712f56a83422ccf9b6c1aa2a058deddb35c6451b0a2c3b2a384e334
font_01_sfnt_off0001336d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336D 10980 bytes
SHA-256: 67d53e440609d4427fea1a03d3b402ee5e76ab8e7e046d52e42036e52644ec80

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