Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00b30b4ad9ee483…

MALICIOUS

PDF

66.6 KB Created: 2020-12-27 19:23:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 62244ad36576aab24301a1bd5b8a9b4d SHA-1: bd39632e972fd8f54f8bebae16d856f6ac73ce69 SHA-256: a00b30b4ad9ee483e0ef67fca9d75f3e9e2c7d4e8498f877d8700bb61bacc06d
214 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm. The ML classifier and ClamAV detection strongly suggest malicious content. The embedded URLs, particularly 'https://traffine.ru/123?utm_term=c+sharp+pdf+viewer', are likely used to lure victims to phishing sites or further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=c+sharp+pdf+viewer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5fa6f06d69d59.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/f86736dc4.pdfIn PDF document text
    • https://ravixolagawiji.weebly.com/uploads/1/3/4/4/134491843/baxedow_mamik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470024/normal_5fa57a6145a2f.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/zidosozawok/tutisapagevaluwixon.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/chaar_sahibzaade_full_movie_720p_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/rakojikus.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/banjo_tooie_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/65367607517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12725dae-3c1d-48e7-b440-75122274f78f/minecraft_skins_for_pc_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/44992009083.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/rising_tide_warframe_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8033dc-e86a-4e1c-b2d5-8d708040bc49/78279224807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d46a864d-a649-41a7-8f3b-24e06585c0ac/14922419497.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_off0000c648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC648 5156 bytes
SHA-256: 25ee1ca338b60ee275701bb0809bbdfbc65dc0e8f8f766d289e659474aeddcbf
font_01_sfnt_off0000d7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E0 11216 bytes
SHA-256: 632209e02f500010667dabb6e407acfa5cf3442e48cce58bd3b0e8236ad47b8f

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