Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde49bc335b168ca…

MALICIOUS

PDF

77.2 KB Created: 2021-01-04 22:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fc743149d1eadb85ed6983db94553f15 SHA-1: 1e0516786311c74da2606e71503ef0cb46a8170e SHA-256: bde49bc335b168cae729f8556e112b6fc67096f3a16f51ba00fe47528705214c
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to distribute traffic. One of the embedded URLs, 'https://traffmen.ru/aws?utm_term=chamma+chamma+dance+performance+song', is identified as a malicious redirector, suggesting the document is used to funnel users towards malicious content or phishing sites. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffmen.ru/aws?utm_term=chamma+chamma+dance+performance+song In PDF document text
    • https://cdn.sqhk.co/vorowobenune/wjdyjjY/ice_scream_horror_neighborhood_2_download.pdfIn PDF document text
    • https://xotagolopotipik.weebly.com/uploads/1/3/4/7/134713968/musig.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5fc163ffee13b.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/futuwawurenez.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/waxilozakapozakem.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/0bf8bc84e3.pdfIn PDF document text
    • https://wegenagozej.weebly.com/uploads/1/3/5/3/135394478/5562024.pdfIn PDF document text
    • https://kevititexozasen.weebly.com/uploads/1/3/2/7/132712545/xubib.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/0122d7ee-d2bb-4c98-8ccd-6a843d693e5d/76136323816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0692d64-dbab-43ee-be2d-7a5ddb124996/sokafojon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd995a62-fc65-4a2d-bab9-4fd7e95c30e8/elvis_what_happened_download_fre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb059021-8e24-420c-ba0d-180aa540b6eb/uiuc_stat_400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4670ef99-a903-4c2d-b203-0a445c8e8c75/rebelion_de_tomochi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d3758d6-b29f-4a88-9fbd-38861ada0ab3/trend_lsg_election.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1db058-bb6d-4d81-a176-704490f62c03/jaxuravopode.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_off0000f1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E5 5440 bytes
SHA-256: b912d9bad769361aa17a054650a8648a364f5d26134a7c087edb433b1a63ebe6
font_01_sfnt_off0001043e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043E 10440 bytes
SHA-256: 7f3f1e5d77d38abc1c5cd7e433f7ab9551d2d847cd45abd4b087978faa692afe

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