Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac972a92134a2c30…

MALICIOUS

PDF

75.1 KB Created: 2021-05-26 04:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 78b5932f54c4af3c0c15a65f06582b82 SHA-1: 6c5fc8b00d79bda17eddb83ed3bf98d23fcbdca0 SHA-256: ac972a92134a2c30639467ccb2a5dbec581a7c47f62f4117e760458ccd10d8cd
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 pointing to benign content, but one critical link to 'maypoin.ru' suggests a phishing or scam attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a link farm designed to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://maypoin.ru/strik?utm_term=how+do+you+open+your+chakras+for+beginners PDF link annotation
    • https://nurekagenarufab.weebly.com/uploads/1/3/1/6/131636906/5168349.pdfIn PDF document text
    • https://sanufelileme.weebly.com/uploads/1/3/0/7/130775971/xefopoxorapo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387808/normal_5fdb159ee941c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392658/normal_6045644674318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383912/normal_5ff4d3c25421d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476432/normal_60054ad0aebc0.pdfIn PDF document text
    • https://dodilepu.weebly.com/uploads/1/3/4/4/134444379/lolixene-fonisewer-vukamedemize.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/kujesulad/lagu_alangkah_indahnya_dunia_kurasa.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/werituvemaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/letra_porque_el_amor_de_mi_alma_solito_me_dejo.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/informazioni_traffico_autostrada_del_brennero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6756387c-f735-4f87-868a-4c3a9ab71a1d/74983305256.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/bailment_and_pledge_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fad9c55-092a-405f-ab05-2474183fe937/1971_oldsmobile_cutlass_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/66103390525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeef73ae-7b1c-40d4-b1f7-cb90eabac4e6/dafajumuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/129a1eff-53b6-41f2-ad90-5f3ffb5722c6/71784888655.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_off0000e79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79F 5744 bytes
SHA-256: f62eb5bf2b08de230666ecb5725592e5bf5139eca4d2c4108c3864d985a9d3a8
font_01_sfnt_off0000fb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB41 10592 bytes
SHA-256: d14b4557c99c80db3b6b45eca9d7e1b606cf71412d0f63c05e277f7e9a097f0e

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