Malicious PDF — malware analysis report

Static analysis result for SHA-256 105e7068291bf19d…

MALICIOUS

PDF

78.1 KB Created: 2021-04-04 02:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 71dc7329e1dfdbab0e4d535936ab9faa SHA-1: 16976efa92080273715541532e3cd9606d193729 SHA-256: 105e7068291bf19db29c0465d652fe384bf0477937e4faa0ca3ba3bf8de46903
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 0.9998

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 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://dugedepap.ru/strik?utm_term=kenmore+washer+80+series+lid+switch PDF link annotation
    • http://neridofufuleteg.scienceontheweb.net/mutijamugelegilibibez.pdfIn PDF document text
    • http://gakmancreatures.ru/how_to_sync_a_harbor_breeze_fan_remotexisf2.pdfIn PDF document text
    • http://momarivido.mypressonline.com/libros_para_aprender_frances_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/GTg2gfa/big_shark_little_shark_read_aloud.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/kti_bendungan_asi.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/3Mhdgjg/cosmos_flower_seeds_online.pdfIn PDF document text
    • http://sungo1.space/dofumewidetejamifabuwufislizwq.pdfIn PDF document text
    • http://tizezs.xyz/damage_report_format9xdmr.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/0307ab6b-9556-4394-9d2f-4767ef6905f6/how_to_pair_anker_soundcore_headphones.pdfIn PDF document text
    • https://a19d597f-2220-41b3-9459-688249e8a20b.filesusr.com/ugd/f19f53_af5b234d4cf34f96ac8cad838becbed5.pdf?index=trueIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_e1dd891ecfec4edba88d6a3efe8a581c.pdf?index=trueIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_972dfbcb494648ebb9c52ee66c33e082.pdf?index=trueIn PDF document text
    • http://nopugorib.onlinewebshop.net/how_to_train_mental_endurance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8d2e860-2c1d-417c-a3ef-0cfc9763a3b3/27463404251.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/sternal_precautions_adls.pdfIn PDF document text
    • http://pagilupoge.rf.gd/21939074054.pdfIn PDF document text
    • http://dugafoto.epizy.com/ada_o_el_ardor_epub.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_off0000f2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 5576 bytes
SHA-256: 3c4237d9c9d06c8818acd78c41bd0a865fce45e340aa398e047e421e2df4e728
font_01_sfnt_off000105a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A8 10904 bytes
SHA-256: e99a29d8f65dd71c1a14377d09a32cc977ad7bf7540ccf5e6debbace95d5cb8c

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