Malicious PDF — malware analysis report

Static analysis result for SHA-256 c882c8e52947789b…

MALICIOUS

PDF

83.1 KB Created: 2021-04-16 07:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ad06b4a97feb968f58a4e15572b56bc8 SHA-1: c948be42bc9be74ae1f5e2bf9a1ba67edff22c27 SHA-256: c882c8e52947789b19ebd01453f1c7ec692fffc2be3215d6c9a146d20629b47e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

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
  • 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://jottigo.ru/strik?utm_term=samsung+ipolis+username+password PDF link annotation
    • https://xamoxuwubedus.weebly.com/uploads/1/3/2/8/132814415/2712717.pdfIn PDF document text
    • http://polikarmonolit.ru/what_causes_sores_on_hands_and_armsu91w2.pdfIn PDF document text
    • http://keepxufi.space/3615889817vz8o1.pdfIn PDF document text
    • https://cdn.sqhk.co/jobasalem/djgMgi0/fatazezuma.pdfIn PDF document text
    • https://wazalitewisoka.weebly.com/uploads/1/3/5/9/135960923/6860597.pdfIn PDF document text
    • https://mapaforidax.weebly.com/uploads/1/3/4/0/134012560/kibijupana-fogogubo-xarojolu.pdfIn PDF document text
    • http://liketime.fun/nfl_schedule_2015_playoffs_2015-16rkq0l.pdfIn PDF document text
    • https://bovejivisesuja.weebly.com/uploads/1/3/1/3/131384116/kimozuv.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/bhghiaj/disney_los_objetos_de_los_warren.pdfIn PDF document text
    • https://gimoxawoja.weebly.com/uploads/1/3/1/3/131380550/1095709.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/egcTjgx/32814142062.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/pibajuwi/cast_iron_foundry_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/mawarekoluzibunediwara.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/damepukefebaxe.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_b86191bfaac64eb3bdf0eb1c913d83b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/cyberghost_vpn_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/94382777416.pdfIn PDF document text
    • https://3c2b787d-8465-4662-bdcc-bf736d584291.filesusr.com/ugd/8760e7_1af84542ab4c47e3ab50c3fb0469d869.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xopugup/rimalirogiri.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/zedub.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_off0000f598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF598 5472 bytes
SHA-256: a036ba5c0cf2818053e9318bc1974390128fb73356f8aae06bf45a37fad0860e
font_01_sfnt_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 3120 bytes
SHA-256: fde507d3e12ec33e68adf7e75fc7402ffd28b0db1492fb6dd1e3c49ab7b9519b
font_02_sfnt_off000114aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AA 11868 bytes
SHA-256: 0ef8c9ac11e7a84cb57f71ab774f6e58b19b307545617c96ffe4434fd427f76e

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