Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70fb0d5c81b1ea5…

MALICIOUS

PDF

81.9 KB Created: 2021-03-09 19:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8631ad4761acf515f7ab909458a227d0 SHA-1: ca186b22ec81bbe51a00bbbc2f535c056c7ea76c SHA-256: e70fb0d5c81b1ea569a8f7db9611e939d32d169316c8df0a5e44547374fde713
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to disposable domains, flagged as a link farm and likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://midufefew.ru/123?utm_term=sales+and+marketing+executive+job+description+pdf PDF link annotation
    • http://zzzmmmmejjj.space/how_much_is_the_monash_fodmap_apprmzqk.pdfIn PDF document text
    • https://cdn.sqhk.co/pofadugilip/djjomOw/maliretobem.pdfIn PDF document text
    • http://leopards.space/ratadipezefawepilisopox4k06.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/is_the_a_sequel_to_twilight_series_books.pdfIn PDF document text
    • https://cdn.sqhk.co/xenaporo/ghoUggQ/addis_ababa_city_population.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457563/normal_5fc610d84fc61.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/mutiwel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470389/normal_5fc92579da0f1.pdfIn PDF document text
    • http://all-gopro.com/tojejonevzos54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408002/normal_600e405fada26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412900/normal_5fe33663317d7.pdfIn PDF document text
    • http://funseeds.site/lone_ranger_and_tonto_fistfight_in_heaven_sparknotes3skex.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/american_red_cross_jobs_buffalo_ny.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/kilidatagawitisumodipe.pdfIn PDF document text
    • https://cdn.sqhk.co/pimabosi/bghhfgi/70569641798.pdfIn PDF document text
    • http://komarovskii.xyz/lowes_whirlpool_water_softener8q9as.pdfIn PDF document text
    • http://organicnu.info/sulekomapoliditolabaroc7bip.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/bb8tIe6/23622042167.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/xemoxexuz.pdfIn PDF document text
    • http://kostlike.site/152888848107oau9.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
    • https://uploads.strikinglycdn.com/files/3ac4a78b-460d-45c9-8e95-10620011cbb8/17708622497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8be5032-4d33-486d-b139-3a4abc94f0d5/86420103570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880e46cd-1328-450d-9a45-f90e228eb43e/larupekuxixemepimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95be2d1f-d619-4f8d-905e-bdaab98ac517/90229295884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3628c2db-adfa-4c90-83c7-2cea9e4fe1d9/how_did_the_agricultural_revolution_contribute_to_the_start_of_the_industrial_revolution_brainly.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC0 5868 bytes
SHA-256: e24e9cab538e549c7051b4021b206f612191a8ef6449a20bd245d0038c8e731b
font_01_sfnt_off0000ee9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9F 11424 bytes
SHA-256: ae8fc6643b370ac2faff82d1e65d9bc9154e18eb91adafcd30ea1209cf7b6d83
font_02_sfnt_off000115bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BC 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off00012aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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