Malicious PDF — malware analysis report

Static analysis result for SHA-256 31649878e2a8a679…

MALICIOUS

PDF

85.0 KB Created: 2021-01-05 19:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 894ae44dec254db2d3a9dc317db324f1 SHA-1: 7df57a10e02e314e5076f69aa670898ca30c1030 SHA-256: 31649878e2a8a679d20478a2b5003db671159e6ad040b0e9a508c4fcdb380bc9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. One prominent URL, 'https://traffnew.ru/123?utm_term=wildgame+innovations+razor+6+manual', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=wildgame+innovations+razor+6+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383300/normal_5f8c381605a6f.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/polupotekisoga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420224/normal_5f9f3de0764c7.pdfIn PDF document text
    • https://jotafatebukuzeb.weebly.com/uploads/1/3/0/7/130776674/vatoxezexa.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/eyhajas/55109696004.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/03871b99-44ea-4252-9547-d5fcc1c00194/marvin_elementary_school_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83f4ef5-2961-4b75-b33f-312cb7b34d63/lumaxixokotelujagexugog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5059742f-4abd-4d52-868e-aa6bab80b794/five_nights_at_freddy_s_free_unblocked_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/19891142870.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/psicologia_la_personalidad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0320500-0966-4881-854f-c745f64d51e6/47952365351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd3be622-c8b6-40d7-88af-641ac13959e2/maybank_ezypay_plus_rate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/770d5df0-39c5-4f18-ac81-dd0da6679f50/pevifawokukamibeguz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b6e775-57e0-4dc7-94da-40deaa42a1c6/hp_pavilion_plugged_in_but_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e38ecae8-872b-433d-ace0-3e92a24a3afb/82729530942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4bd93c3-616d-49f2-8d02-a5e153711736/84232731796.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_off0001013f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013F 5424 bytes
SHA-256: 7177f8e6d86456006b9bb9632d81ccc19db38f2233f3c5903270b2144fdb55e2
font_01_sfnt_off000113b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B4 10556 bytes
SHA-256: 29df1be24f76184cacfe8f35432dee59af2e164ff9177135eb5e88da9e8bc914
font_02_sfnt_off000137db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137DB 3736 bytes
SHA-256: 49d2a9f4d13a6f9e947c2c460b42f15fd7f19482849b7117c56bd13b8a789813

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