Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c4d8ec083f2aa2…

MALICIOUS

PDF

86.8 KB Created: 2021-03-21 06:47:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d96138edaba4f49750b981ce6b882cf9 SHA-1: b884f13cd6f7006455411ecddf1f8515ea8b6e8f SHA-256: b5c4d8ec083f2aa2e8672ea4f7049bda6de8680d0a7a1128d518a84136da67af
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded links likely lead to further malicious content or phishing pages, aiming to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://xezojetit.ru/wix?keyword=cambria+county+recorder+of+deeds+fee+schedule PDF link annotation
    • http://ita-bio.space/95543971212rrp5d.pdfIn PDF document text
    • http://ulekschool.online/last_resort_pokemon_gozmhyi.pdfIn PDF document text
    • http://fullcreditreport.info/birovopedinidivigigakj9v.pdfIn PDF document text
    • http://runolive.com/salesoxulamuualjb.pdfIn PDF document text
    • http://pochta-24.cc/285116579824apf6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/nosukirazinapasexa.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/43929850539.pdfIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_38994f1266134c7faabcba5c50146efb.pdf?index=trueIn PDF document text
    • http://nukivamo.myartsonline.com/gupima.pdfIn PDF document text
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_cc9d3d5640574a03a7974cd04e0cc65b.pdf?index=trueIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_c88b0b50211346b69fffa5cecec846ef.pdf?index=trueIn PDF document text
    • https://8cff2b46-3289-4d4c-b6d5-84761b4963bb.filesusr.com/ugd/c91274_f0ff218e3616410aa15555d0839cc52a.pdf?index=trueIn PDF document text
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_7f11b1dd7e3f47419862b93c6ecff527.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/xefakijumizexeruvik.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/57881437971.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/70134838759.pdfIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_d61521b90d3c45be95fb68558ce16b59.pdf?index=trueIn PDF document text
    • http://xurosuforudev.atwebpages.com/how_many_hours_does_it_take_to_fall_into_a_deep_sleep.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/l_t_annual_report_16-_17.pdfIn PDF document text
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_edebb9298ec74b7498b2a93adf3330bf.pdf?index=trueIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_eab3bba47262428f8bebfc9cffbb041c.pdf?index=trueIn PDF document text
    • http://livirava.atwebpages.com/fundamentos_basicos_del_voleibol_saque.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_off000112e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E2 5408 bytes
SHA-256: eb76596692dbcc77e2b98e1d453cc73e37f2362b29a1052dbb0473be85d50d1d
font_01_sfnt_off0001251c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251C 11884 bytes
SHA-256: 5ffc81469e880c34cb37279c9155574294c926f27af98952ef2b4e98b9e1659e

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