Malicious PDF — malware analysis report

Static analysis result for SHA-256 848f550edfce0ece…

MALICIOUS

PDF

75.0 KB Created: 2021-03-12 01:13:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 72a70ec1940faa66c621b5fa88d6d7e6 SHA-1: 4fc763ee56a40ed47be443bb5177d677facc1023 SHA-256: 848f550edfce0ece3fb8f98414142c837275140769a167ed652160f135aa690c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a "PDF_SEO_LINK_FARM" designed to host a large number of external PDF files. One of the primary URLs, 'https://golowaki.ru/aws?utm_term=raisin+in+the+sun+walter+character+analysis', suggests a lure related to search engine optimization or content manipulation. ClamAV detection as 'Pdf.Phishing.Trojan' further indicates malicious intent, likely to redirect users to phishing sites or download further malware.

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
  • 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://golowaki.ru/aws?utm_term=raisin+in+the+sun+walter+character+analysis PDF link annotation
    • http://wssummer.space/99808355051gfh9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481528/normal_5ffe7a2293d77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443326/normal_5fcce6e6c0df4.pdfIn PDF document text
    • https://mokazeke.weebly.com/uploads/1/3/1/3/131384082/nugobepitejubakuk.pdfIn PDF document text
    • https://kuxijixa.weebly.com/uploads/1/3/4/8/134856984/a0e2f3a4a545.pdfIn PDF document text
    • http://topshops.website/vehicle_bill_of_sale_nc_template16cba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388067/normal_5ff9e413728b1.pdfIn PDF document text
    • http://jirafka.space/dilivenisomuoja6s.pdfIn PDF document text
    • http://introdom.ru/dewalt_pressure_washer_instruction_manualefxxg.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/rilexazejuzovep/fowomunisesuwodatuve.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_092674a3273f4c3f86cbee6ed2737eac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pegebunov/21353930684.pdfIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_b373414726964d19ade78c0918ceaf9b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/gaxugipuxupobawewena.pdfIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_594f62a1003e4401a631512904423e7a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ebc477b-1af0-4255-8ac1-739cd3ca903e/89442922021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e6c65ea-2ed9-4af6-ac07-9036d765cffe/workcentre_7855_drum_cartridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d61fcc5-4454-43cf-9f66-8fe2dee62421/kitchenaid_artisan_5_qt_stand_mixer_matte_black.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/reported_speech_exercises_b2_level.pdfIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_1ef6ccebea2d412380ebcf8176f6415e.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_off0000e962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE962 5088 bytes
SHA-256: 7fdce900eb992b7d47fdfc4b2de253c24ef08559abd4c6033d32b589c0052f28
font_01_sfnt_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 10372 bytes
SHA-256: 0c4e257ab3c652137078bd32fcc9d2498ed7521814d59494e31623010544d844

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