Malicious PDF — malware analysis report

Static analysis result for SHA-256 058772c1eaa582c0…

MALICIOUS

PDF

83.0 KB Created: 2021-05-20 01:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2385ac928d53d3a47a0b120f25d5d45c SHA-1: 92c1bfa101907a47fe503638da800bb9576c84bd SHA-256: 058772c1eaa582c091fe909a9e256e4edd7cd5000c2cddf632549113a77b1edb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. One of the primary external links points to 'bologen.ru', which is likely a malicious domain used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=ficus+ginseng+care+tips PDF link annotation
    • https://tugunopoxakisif.weebly.com/uploads/1/3/1/3/131398472/6060062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5fd7876367a50.pdfIn PDF document text
    • https://kefawefixak.weebly.com/uploads/1/3/0/7/130738991/gegifonamoku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393893/normal_602daaa8e4598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384029/normal_603f0dd9a5dec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473638/normal_5fe81147de40f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5fd63b1b75b98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412896/normal_600e222a3dc84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500679/normal_604f2c71718ea.pdfIn PDF document text
    • https://jugafuxuxeg.weebly.com/uploads/1/3/2/7/132740719/fuxijebazoleboveteju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485698/normal_602381d8f3369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461777/normal_604fef881a6e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_6012639862482.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/f6b6a652-7841-4d18-88a2-3e6699856ed4/how_to_reset_bft_electric_gates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89cf31bf-0fb8-41e6-93d5-f7e7e9974a06/bekabirilepot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc7fc98c-71d8-4a51-a51a-79dd92f280c3/the_boy_in_the_striped_pajamas_full_movie_watch_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/lexisnexis_sample_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d3dade7-b166-4ee7-a637-86d3723eccdd/empleos_en_empacadoras_de_aguacate_en_uruapan.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/palisidadufelirudesunus.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF136 5024 bytes
SHA-256: d8ab712a67bfdea03e8c618666949117231142d2ac50af5ac0ad1509c34a284a
font_01_sfnt_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 10756 bytes
SHA-256: 89f2f3b330008e1e095ef7534995419d82ed566a821dc880464e14eeb957ed8f
font_02_sfnt_off00012764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12764 16376 bytes
SHA-256: f267a97a42ed964490c0c36cf8d24d30f5cfc386ee24850e75bb3a4991f11828

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