Malicious PDF — malware analysis report

Static analysis result for SHA-256 166a5ebce4a32203…

MALICIOUS

PDF

75.1 KB Created: 2021-03-23 13:30:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a4ab3b9b7504f9a0961502c78f856c2f SHA-1: 0c7220fdb11c576c57f9e3a5a24bd9a9d2b3aa5e SHA-256: 166a5ebce4a322031905242f5e1e805d05ce3ff73609aa765a1829de50cc0ddf
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm, containing a significant number of external URLs pointing to potentially malicious domains. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. While no scripts were directly extracted, the structure suggests it's designed to lure users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://lozipotod.ru/123?utm_term=boy+girl+friendship+status PDF link annotation
    • http://salonop.xyz/how_do_i_add_apps_to_a_samsung_smart_tv0f5un.pdfIn PDF document text
    • http://lastmarkt.ru/que_es_un_calibrador4lvmt.pdfIn PDF document text
    • http://electorat.org/88777013504fzrvm.pdfIn PDF document text
    • http://erethiztzj.space/sea_doo_islandia_owners_manualpkl0m.pdfIn PDF document text
    • https://tagesokute.weebly.com/uploads/1/3/5/3/135315496/xadokidike_zapaluvida_galuzuroru_xipabarasime.pdfIn PDF document text
    • https://vetitigozep.weebly.com/uploads/1/3/1/4/131437709/jiriguwew_losar_nekuwewofo_jezilog.pdfIn PDF document text
    • http://rocketdocs.us/nuloximufuvotodaporerihoszn.pdfIn PDF document text
    • https://nodazijokavi.weebly.com/uploads/1/3/4/3/134315007/jogasa_fuzugetizanew_ritajaxadiko_xopifasebenur.pdfIn PDF document text
    • http://gladkoe-telo.xyz/sennheiser_xs_wireless_microphone_system740n3.pdfIn PDF document text
    • http://bubble1.space/rubexijubeniruwem50fe9.pdfIn PDF document text
    • https://tapukupe.weebly.com/uploads/1/3/4/7/134717462/betodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f0ddeb88-3549-4a27-8821-6e3dd713f165.filesusr.com/ugd/2b74da_99231bedb6224d8794f7a1724e41677e.pdf?index=trueIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_a78630a95b5d4b31a450ec19029b1419.pdf?index=trueIn PDF document text
    • http://tivuduke.rf.gd/66074818539.pdfIn PDF document text
    • http://sijurajogo.epizy.com/all_thats_solid_melts_into_air_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d403bf-e61d-4719-8eaa-5bd2da477a7c/needful_things_store_oak_park.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cfd490d-bebe-4d2d-ae22-7c88fe0e1527/19178721994.pdfIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_d4d784b768ef488bab446da7e26d0fab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/504432d6-445d-49e7-a486-cd771498a65f/babejon.pdfIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_a376b4aa9010479d8ce5bfdc5aca079a.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_off0000e6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D4 5456 bytes
SHA-256: 03dc68d6c802b1b04c76660af0a97ff9b1494d9b5b8fbad54dc36b396a989abf
font_01_sfnt_off0000f96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96F 11260 bytes
SHA-256: 10248e4d9564ab75f8a32890e83d819911914ce9a18e03af5b438eaf74102b06

Open this report in the interactive analyzer, or submit your own file for analysis.