Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ab5ed77be8afb4…

MALICIOUS

PDF

68.8 KB Created: 2021-03-30 21:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3b38df0730e6495b0d9b486c1c9cf719 SHA-1: 54647a605de92b07e4a6cf7c4e8bc30b318a4802 SHA-256: 84ab5ed77be8afb463c2831e95cd9cbb0759fd7a8c9d7f9c0903dbe1bc721f78
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 0.9993

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 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://dafemum.ru/wix?keyword=champion+4000+watt+generator+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475995/normal_5ff029632efb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467564/normal_6001404c6c6af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409818/normal_5fddcd529c104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fd198884a8af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5fd1507d14e9a.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/33275416611.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418570/normal_5fc7ac7dad8be.pdfIn PDF document text
    • http://sifimomikev.sportsontheweb.net/lotagirutuzezekipemeruf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459630/normal_603e92dab5eef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5fd8cbf645704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464313/normal_6034277d543f5.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/dilajovawakofowefoni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491723/normal_6026bfc7733ce.pdfIn PDF document text
    • http://kofupum.mygamesonline.org/pentatonix_amazing_grace_my_chains_are_gone_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409250/normal_5fd68a15207e1.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/panalipolifod/80544346262.pdfIn PDF document text
    • http://zafokogilose.rf.gd/length_conversion_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/91331793118.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/linear_programming_and_network_flows_2nd_edition_download.pdfIn PDF document text
    • http://zuvuvejuxika.epizy.com/are_resistance_bands_good_for_building_glutes.pdfIn PDF document text
    • http://vufilupirudote.rf.gd/the_whirlwind_girl_2015_sub_indo.pdfIn PDF document text
    • http://fogaweja.epizy.com/kuvitixil.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/naxabijalavolinapodoba.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_off0000cf10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF10 5428 bytes
SHA-256: a58d52813bf7ed1e23a4d03378b7db4fd7ab1e6247793582f7ab00a043ee2666
font_01_sfnt_off0000e171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE171 10708 bytes
SHA-256: 88a5c1b87c206903525f5aaf12c53327fd301c999f2085132583e6685bc08b6e

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