Malicious PDF — malware analysis report

Static analysis result for SHA-256 756791abe466ddc3…

MALICIOUS

PDF

78.5 KB Created: 2021-05-16 08:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: abf519a48b624f9946cf4414d3099f16 SHA-1: e62faf2bda5364d955fd2f5a0cbcacda794049ca SHA-256: 756791abe466ddc309c9c79f14e01cad37bb95fad13a270cb43223e311560e3a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, strongly suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection confirm its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to malicious content, likely involving JavaScript execution within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://resalured.ru/strik?utm_term=heal+your+life PDF link annotation
    • http://helpverifybadges.com/negiwekebajulavii2pci.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447487/normal_5fc757dc81194.pdfIn PDF document text
    • http://mitefakosutupot.22web.org/97313743777.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477156/normal_5fed5840d16b8.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/jh2uFjf/basketball_training_program_for_youth.pdfIn PDF document text
    • https://cdn.sqhk.co/visunexabore/figQiet/up_board_class_10_english_solutions.pdfIn PDF document text
    • http://swiss-gear.store/liropumokereg461.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486051/normal_5fe20fda9a79b.pdfIn PDF document text
    • http://demazopozegefo.22web.org/42295080106.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/gjGGgh1/nisaginofefuniwogudi.pdfIn PDF document text
    • https://cdn.sqhk.co/xumupojamax/bjhqAij/raystorm_neo_waterblock_intel_metal.pdfIn PDF document text
    • http://iminn.ru/2001_suzuki_sv650_service_manualnzq4f.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://lorenbayi.com/torisimunodi6oc9i.pdfIn PDF document text
    • http://service-hire.com/883678132771goq8.pdfIn PDF document text
    • http://wofijolusiga.iblogger.org/74917335567.pdfIn PDF document text
    • http://verification-help.com/63644450745sghmp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8b7199fc-a029-4910-8138-caee300d1cbd.filesusr.com/ugd/da8f68_32a2922c15fa455181033e452afcab75.pdf?index=trueIn PDF document text
    • http://tavubemafixa.rf.gd/women_s_bible_study_lessons.pdfIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_2eda3a1bfcf246839fa52dbe9fc3aa93.pdf?index=trueIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_2bfb8602f8f94dc7b519088100b10e1d.pdf?index=trueIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_746844be42ba45c1bb9660466580bf04.pdf?index=trueIn 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_off0000f942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 4644 bytes
SHA-256: af24036dfa2abb8f1863ef17a527bc5af046f4258c0ac25758161a63135dbcd2
font_01_sfnt_off00010925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10925 10508 bytes
SHA-256: 4ae6b73d70840fca70b8931c226ca6559d8c17cdcfd676a9d29a50f27348a38e

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