Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a4e4820ce67d5f…

MALICIOUS

PDF

76.8 KB Created: 2021-03-09 13:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: aaf6d5609a3675f11da72774fcf11e1b SHA-1: 57c72ade1dc706cc4e7ca156e13bbe9fa8f19616 SHA-256: f2a4e4820ce67d5f85986966c7d24834c09855eb7a12722c76a297dca34342f3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to setting an alarm clock, directing the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wb?keyword=how%20to%20set%20an%20rca%20alarm%20clock PDF link annotation
    • http://depusapo.mypressonline.com/58583149968.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368958/normal_5fddd07408621.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465557/normal_5fceb3d3f0eea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475209/normal_5ff756519b00f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370987/normal_5fe160ab651ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412164/normal_60134d0f82487.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421464/normal_6000c1488384f.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/17561252841.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409609/normal_5fe535738e923.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446165/normal_5fca9ed3a3c6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474450/normal_6025302b9e9ce.pdfIn PDF document text
    • http://punejew.mygamesonline.org/why_did_northerners_want_high_tariffs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416932/normal_6019d298845a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384470/normal_6030fdd86f663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423443/normal_601d169521afd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeec41fe-cf43-48c9-a46c-93a5af002267/romance_of_the_three_kingdoms_xiv_gameplay.pdfIn PDF document text
    • http://wopojofa.atwebpages.com/59577869216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc675608-c273-416e-a33d-65671ce0d2b6/53271302850.pdfIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_66b499b0be614c4fab7fe4f4c2959d3e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a95984-d3ba-41ea-8a76-2a12db55c9ee/coleman_northstar_dual_fuel_lantern_mantle.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_f4666b6a6b134152979b1826d9d5bf9f.pdf?index=trueIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_5b0f66a748194848a13b50654f6c75d5.pdf?index=trueIn PDF document text
    • http://rukosivujuxu.atwebpages.com/zuxiputafadevedino.pdfIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_1f5f14820d834ca4acb57ff893337ce5.pdf?index=trueIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_d427c58826cb426cad5eeb105aa8f483.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 5064 bytes
SHA-256: d85dfef07d1c275454241ecfa00a165aa08563bd664989ec1b0756dc2a62e646
font_01_sfnt_off0000fddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDF 11620 bytes
SHA-256: 29149316e7832806a40762852076da481a201a85b95f859832c1dcd69d697240

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