Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc2d084c7d07290e…

MALICIOUS

PDF

73.8 KB Created: 2021-01-10 06:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 9e1a04463f81185803becec97f23fe09 SHA-1: bfa4a70e4b8246d5c2da0a3421dd4be4871ee861 SHA-256: dc2d084c7d07290edb649330880bd4f422c5abd7aab4150a1b905ec0e0c4bc3a
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with critical heuristics indicating it functions as a link farm and a redirector to malicious infrastructure. The ML classifier and ClamAV detection strongly support a malicious classification. While no scripts were explicitly extracted, the nature of the embedded links suggests an intent to lead the user to phishing or malware download sites, aligning with spearphishing attachment tactics.

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://traffking.ru/123?utm_term=verbos+irregulares+en+ingles+con+pronunciacion In PDF document text
    • https://vekerarefatada.weebly.com/uploads/1/3/4/8/134868636/2832c50bdb43.pdfIn PDF document text
    • https://site-1176223.mozfiles.com/files/1176223/diversity_training_definition.pdfIn PDF document text
    • https://lozugukavokukes.weebly.com/uploads/1/3/4/3/134357100/2194cc01b625.pdfIn PDF document text
    • https://tivurenufetoza.weebly.com/uploads/1/3/4/2/134235987/6b0144e98b9.pdfIn PDF document text
    • https://jasesokotu.weebly.com/uploads/1/3/4/4/134499989/3471362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418777/normal_5f97dba1cae41.pdfIn PDF document text
    • https://laximazerafa.weebly.com/uploads/1/3/4/2/134235816/xekodet-puraruz-sedulenaj.pdfIn PDF document text
    • https://site-1172210.mozfiles.com/files/1172210/furia_de_titas_online_dublado_hd.pdfIn PDF document text
    • https://dobuzitususuv.weebly.com/uploads/1/3/4/4/134470967/1601293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451363/normal_5fa92f30402c6.pdfIn PDF document text
    • https://vomalokigalexa.weebly.com/uploads/1/3/4/3/134329787/fugogulij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bibejovixapis/dadupeboxeresujabu.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/83385827133.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/jozuletevavopafiwuweboba.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/panasonic_ag-_cx350_4k_camcorder_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/meluwezufi.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_off0000d332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD332 5008 bytes
SHA-256: 30c16b17dc97be52ea0d719d833368969b7c61f1fdcbfe144ff5754b3d031573
font_01_sfnt_off0000e43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43D 12092 bytes
SHA-256: ae45aeb22e732a10b6b2e356bcfc56dd9981051c182b9ba7d82e2335750cd512
font_02_sfnt_off000109ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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