Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b672b159bffaf5a…

MALICIOUS

PDF

90.1 KB Created: 2021-03-08 23:20:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 02aa35c4202cd84a6d2b1dcc66bc1c75 SHA-1: 5e3fa7249bc19263e3b508a1093eea1c62413373 SHA-256: 3b672b159bffaf5a5a7c0a60c0287533c86684ec6a67521e5334da45b4b8c9a9
186 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 0.9997

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://xajibur.ru/wix?keyword=porque+es+importante+la+economia+para+el+ser+humano PDF link annotation
    • https://wobakasufafe.weebly.com/uploads/1/3/2/6/132682589/75f0340622359.pdfIn PDF document text
    • http://padlamadla.site/rosencrantz_and_guildenstern_are_dead_script_onlinebqk5i.pdfIn PDF document text
    • http://tdsevsvet.ru/buwageripirusezogijupu7s1z3.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/70745139077.pdfIn PDF document text
    • https://bogekivusuwi.weebly.com/uploads/1/3/4/6/134604255/refoxefotufepugidufa.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/79419519749.pdfIn PDF document text
    • http://kilunanaged.iblogger.org/does_apple_tv_hd_have_hbo_max.pdfIn PDF document text
    • https://dexanobibe.weebly.com/uploads/1/3/5/2/135299911/zorigixaxidajo.pdfIn PDF document text
    • http://gudokav.sportsontheweb.net/tom_sawyer_movie_1973_cast.pdfIn PDF document text
    • http://jirekakeduvinij.22web.org/76150022030.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/961ce5df-5754-424b-89c3-765c59cdfdd4/how_to_edit_image_size_in_paint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea67f219-2570-4e8a-9a19-55978b0a33ab/sonedasarun.pdfIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_ff70cdf227194ce2b3c7f5b06227eba9.pdf?index=trueIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_1496691225a74ae1ac82d65d9205fdf6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b503aff0-4e3a-46d8-bae7-1353458f80dd/zurunopinekikobuluwirew.pdfIn PDF document text
    • http://merujepapi.epizy.com/28687524073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147c8b9d-b461-45a8-853b-10a8d8960c0f/73481828205.pdfIn PDF document text
    • http://sagisat.rf.gd/easy_cryptograms_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e375f267-6871-41da-b715-b637fa02f673/will_dominos_do_vegan_pizza.pdfIn PDF document text
    • http://sifebitufol.onlinewebshop.net/fusotipomorona.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BD 5300 bytes
SHA-256: efc28ddce8f23df81b796d712c74c7ff7e99971f38fd15dbc7609d08b85e4ef6
font_01_sfnt_off0001329a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329A 11804 bytes
SHA-256: 595e924ac3b04fc639412e0b2624e1074ebe917743ac2817e8b11937ad481c52

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