Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c4bf60e5945d3ba…

MALICIOUS

PDF

77.2 KB Created: 2021-03-29 04:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1395035a17cd9f28e4c9391141ad0d8b SHA-1: 57158872654f622469699928bce2a9b47507e2a3 SHA-256: 3c4bf60e5945d3ba746397505b3963c78f05c060676b1323a1f66985f077e34c
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 4

  • 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://gimoguvi.ru/strik?utm_term=marketing+plan+sample+pdf+free+download PDF link annotation
    • http://zekifafeter.scienceontheweb.net/how_to_describe_rainbow_trout_fillets.pdfIn PDF document text
    • http://nunesop.scienceontheweb.net/hunger_games_vol_1_ita.pdfIn PDF document text
    • http://tamogulaganero.scienceontheweb.net/dichiarazione_di_atto_notorio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wovodijulenape.onlinewebshop.net/radio_script_format_example.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/toponol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b5762c-f282-4edf-b0af-620a629fd77a/72275307118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71bcda2b-87cd-41d6-9116-16822688fd1a/plantronics_backbeat_go_810_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/retowale.pdfIn PDF document text
    • http://xarilupinedup.myartsonline.com/alcoholismo_y_violencia_intrafamiliar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ebfb95-6899-4599-9fcd-349b1da1017d/does_sams_club_sell_deep_freezers.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/mabubej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75463610-bac2-4a0c-81bb-5b9b13fb3b63/bryant_plus_90_inducer_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c7566a-c6fb-4a45-b3f8-20c430c42c65/majixolakepepuzenabu.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/bios_key_american_megatrends.pdfIn PDF document text
    • http://nukivamo.myartsonline.com/astatic_pdc1_swr_meter_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a269ea79-5f7a-4610-83fb-cd22025c2510/50586542077.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/what_does_red_light_mean_on_wireless_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4ca862-0b32-4d17-ae85-6387ac7d756b/tebudelusaziz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/979b9624-c379-4501-85ac-a4b02bb9cfb0/vewemunagaz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38B 5308 bytes
SHA-256: 21bed99dcc0a95a6440063a62cf2106e0b084ba0c5f40a5bb9ec43407809386a
font_01_sfnt_off0000f59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59C 10464 bytes
SHA-256: 4b644aa6095356c9c9eff0179404241482e41fe864980420c4119e3830f4ef70
font_02_sfnt_off00011958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11958 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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