Malicious PDF — malware analysis report

Static analysis result for SHA-256 4169686185a2b66f…

MALICIOUS

PDF

96.3 KB Created: 2021-03-13 22:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a21d67ac2d7257de0f1654d80bc49a20 SHA-1: 531d80f33d4e2ee8ecda9ef77eb5b73d78e81f3f SHA-256: 4169686185a2b66fb39153782d3fb9221b7743e095064660e116c81eb9273677
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'baarspo.ru', which is likely a malicious domain used for distributing further payloads or conducting phishing. The document body contains text related to 'Honkai Impact 3rd apk', suggesting a lure to trick users into downloading or interacting with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=honkai+impact+3rd+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392857/normal_604163aaf14b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_6041ee62e7e60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445544/normal_5ff06c8463e0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409992/normal_6023c6591880f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492257/normal_600146ce0d133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381534/normal_601d33c29482b.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/75943ede-a2e2-44d7-b1da-6d87667c2fb8/nejerakimozujotesofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da353fc-f432-4bc0-947a-3470277b1f6b/46960250339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b55981f-20f6-4d1f-becc-6d495f9c8473/dell_inspiron_17_5000_i7-6500u.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f581642d-7c5f-47ac-a033-feacb236e8b6/jinalavizewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf6a95bf-0129-4f0f-aac1-4327956d8125/zilelobexidirelodezise.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/fukivixewaxobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b56d17-ecf0-4732-9946-1c9d45154d53/v_for_vendetta_comic_synopsis.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/blip_and_blop_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/36780022380.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/apple_ringtone_5s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/557e239d-7498-4ee3-93a8-a93710b6509e/foundations_of_psychiatric_mental_health_nursing_8th_edition_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/free_printable_wedding_mad_libs_template.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/7398284650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b633925b-f640-4ee1-9199-e9a305a51e31/casio_ctk-496_price_in_india.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_off0000ed0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0D 25564 bytes
SHA-256: d579e4be99bc6244de3970471ad89bad6a01e3d38e13dfa5413d8924e57e1b76
font_01_sfnt_off00013ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCF 5200 bytes
SHA-256: 0f9cccc9a46bbf0683f43f3c86afbb4e4fbeb50e097dfea7a42098bc76947364
font_02_sfnt_off00014e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E65 10964 bytes
SHA-256: 4f0e3e32e4b68821b3242f19ed168fb99b43da345340601ecffc4c93292e0133

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