Malicious PDF — malware analysis report

Static analysis result for SHA-256 be347afe972d3e2a…

MALICIOUS

PDF

91.1 KB Created: 2021-03-31 15:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c8e1f06f99108c8dc09697aaa31e9fb7 SHA-1: 1aea14b5bab5473d66eab15349f9c6bd51cf81dd SHA-256: be347afe972d3e2aae2cc1d915d8d144498fb43460e897e498d4b2719f4ecf2c
156 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 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 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=sat+tests+pdf+reddit+40 PDF link annotation
    • https://vodivabowadabi.weebly.com/uploads/1/3/4/8/134877230/28242.pdfIn PDF document text
    • https://gopadafuwidu.weebly.com/uploads/1/3/0/7/130740623/nepevunanokuvi-jasesuvewisud-xixediv-zevoze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406213/normal_5ff145f270c46.pdfIn PDF document text
    • https://buginibonimej.weebly.com/uploads/1/3/2/7/132711973/aaf35f698836700.pdfIn PDF document text
    • http://kebenoda.scienceontheweb.net/atwood_rv_water_heater_wiring_diagram.pdfIn PDF document text
    • https://juduloto.weebly.com/uploads/1/3/5/3/135323899/e1451c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472766/normal_5fe49fe767495.pdfIn PDF document text
    • http://arendaavto.taxi/127582161674db0r.pdfIn PDF document text
    • http://gasurorir.sportsontheweb.net/bowflex_treadclimber_tc10_used_for_sale.pdfIn PDF document text
    • https://ruwixotuso.weebly.com/uploads/1/3/4/1/134131383/dudetoji.pdfIn PDF document text
    • http://iranomics.com/ultimate_epic_battle_simulator_gameplay_pcpxx0k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/autobahn_polizei_simulator_2_apk.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_eccd42083bbe4b6e8dece791c00d21af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/optiplex_760_video_card_upgrade.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/what_are_the_ecological_economic_and_social_implications_of_climate_change.pdfIn PDF document text
    • http://jemukiguwuw.myartsonline.com/the_lusty_argonian_maid.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/best_way_to_make_sparkling_water_at_home_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/adcp_degree_full_form.pdfIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_2bc86dc35ac641f9ad151f09cdf53854.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_off0001242b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242B 5336 bytes
SHA-256: c1f0cec4f0a1355f8d173fc5f9f75c459a32a659a1af3ebfaff5c97e4cd65b74
font_01_sfnt_off00013660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13660 11604 bytes
SHA-256: 6dd4312429c4200c083692b1d56dc04e6e6642f8c4fc3b8532c5f79e5ebc66d6

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