Malicious PDF — malware analysis report

Static analysis result for SHA-256 1377c7fcc529715b…

MALICIOUS

PDF

85.1 KB Created: 2021-05-03 21:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e1cd14c76c376b9e2cc04fda44061d89 SHA-1: 5a8260a68a3a047e92a9d6d9553905ebba97507f SHA-256: 1377c7fcc529715b6b928d3880db8427ba10334c43d74e67ab64563d3be8e2ff
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://ponafet.ru/strik?utm_term=what+are+some+good+topics+for+persuasive+essay PDF link annotation
    • https://cdn.sqhk.co/dutedape/ihlji4f/70983364375.pdfIn PDF document text
    • http://sopesukenapad.scienceontheweb.net/83086151518.pdfIn PDF document text
    • http://taygerr.com/fitasidotikesp0n0j.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/fgeDnib/xadodu.pdfIn PDF document text
    • https://cdn.sqhk.co/zekoparan/ghbijeI/tetegu.pdfIn PDF document text
    • http://zanodopowe.sportsontheweb.net/after_book_wattpad.pdfIn PDF document text
    • http://websporizlehd.com/221844563791b4ch.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/ajbjojf/dialectical_behavior_therapy_book.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/6e3e98d3-36b9-4afb-9d18-c0ed1948d592/lotoga.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/definition_of_accounting_information_system_ais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70fe4882-5f81-4743-aeed-3a2e2e50ebcc/puvelojeniwowijuwawopukuv.pdfIn PDF document text
    • https://ea0a6730-5b47-42bc-899c-5b27b21b32ea.filesusr.com/ugd/184298_b6582edb86ef42e8a257553fdb4e750e.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_9297d3720f494226a2c036f70a6e4ead.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/poresi/7689272322.pdfIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_0fc04351d5ad4cf0bc840dbf1e76c713.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/87857884547.pdfIn PDF document text
    • https://764dfaed-7091-4b1c-a8ff-ceb5b694923f.filesusr.com/ugd/4bafdb_ed4e34f01bb14029b471df171b312b16.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c488c495-6b94-4bfd-bf09-856316bf088c/bow_tie_pasta_salad_with_sundried_tomatoes_and_spinach.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d721e7f1-411c-4321-afa8-8bdeb1ca3f03/duwetubamijubodaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f30e64ff-c576-49e5-a143-2b806d03d56c/22336832333.pdfIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_965ca40aa5da42d79a5a0cdc62404e51.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/safago/ruzujetalibiwipej.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_off00010e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E46 5712 bytes
SHA-256: 00ef48487019802497493865ae690bc9c924cc1aa10a5ae420fa1a35fee3b10e
font_01_sfnt_off000121a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A7 10936 bytes
SHA-256: ad53f50e47be83023bb1715810b64ceff1f74ceb8c9b7788913c698747e45e97

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