Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5ed9800e606065…

MALICIOUS

PDF

82.4 KB Created: 2021-04-02 14:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dc00557e6e512b3cbedfb869962d9392 SHA-1: 91572d0dc89ddeb201d5648fb4a8622a3c2b5a70 SHA-256: 3b5ed9800e60606538261ad33e33ca80b98c08a2794496ce10454bfce910ad08
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/award?keyword=princeton+apush+review+book+2020+pdf PDF link annotation
    • https://jileninaniwepuz.weebly.com/uploads/1/3/4/7/134771173/c30d34315cc7.pdfIn PDF document text
    • https://fikozipe.weebly.com/uploads/1/3/4/8/134887908/ralozekovatunen-zavivubevolafig-rakikabokubudev-fowawaja.pdfIn PDF document text
    • http://zitirisiz.mywebcommunity.org/5858292859.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/zizovojuvav.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/geH8geE/nail_art_ideas_easy_at_home.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/IwK1jhf/89097389157.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://s3.amazonaws.com/fosalizuzu/tigakogejim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/945ef777-ee10-4a8a-a0d9-33b031d10fbd/the_natural_rate_of_unemployment_can_be_defined_as.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53887944-44a5-4ae0-9595-d31ee49dce00/38556674130.pdfIn PDF document text
    • http://vovajixavago.epizy.com/bumble_app_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/allan_pease_testbeszd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e111e52-d428-45bd-bb5a-d9715990a635/sanur.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/la_sombra_del_viento_carlos_ruiz_zafon_mercadolibre.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/vascular_malformation_brain_causes.pdfIn PDF document text
    • http://wefatuneramab.epizy.com/dumuvidatuguli.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/7506465075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3941163f-f6ac-4c8a-97f5-53d91b799d8c/toyota_camry_2015_for_sale_in_ghana.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/tatasaxesufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8756f900-f41b-453f-9722-0c2bf5b4b3bf/75079157005.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_off0000f598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF598 5724 bytes
SHA-256: b0e5997add30f4ece9588e893139ccfdc673387f3106c7ef5f4056840d91c234
font_01_sfnt_off0001090f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090F 11016 bytes
SHA-256: ca1889336902a0e779954d49cdc17e85de8a40b226f249c1403ad9be88d005ae
font_02_sfnt_off00012e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E44 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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