Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c5762be9c992ef…

MALICIOUS

PDF

83.5 KB Created: 2021-03-15 04:27:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a42bff9f16c5e774a979313bc120316 SHA-1: e8abaa785a95891b5388307d152908359acd8b26 SHA-256: f2c5762be9c992ef7463a24f61ed44e3f5876707f0bf5428e541fabcb5af171e
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous external URIs, including one pointing to 'golowaki.ru' which is likely part of a phishing or malware distribution scheme. The PDF's structure and the presence of embedded links suggest an attempt to redirect users to potentially harmful content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://golowaki.ru/wix?keyword=beyond+training+jack+c+richards+pdf
    • http://igcopyrightforhelps.com/10197934853wdyos.pdf
    • https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/lebakexa.pdf
    • https://static.s123-cdn-static.com/uploads/4449192/normal_5ffba5538559c.pdf
    • http://serikanipesemo.iblogger.org/elevator_assembly_manual.pdf
    • https://bovefunovowuto.weebly.com/uploads/1/3/0/8/130873908/4190076.pdf
    • http://polystate.ru/signs_a_man_is_very_interested_in_younfxh4.pdf
    • https://cdn-cms.f-static.net/uploads/4391621/normal_5fd6691f17b95.pdf
    • http://jushq.club/roneratubivepemirerepamn7a.pdf
    • http://rejorevubirobu.sportsontheweb.net/zizijexujazakegovegudov.pdf
    • https://cdn-cms.f-static.net/uploads/4447467/normal_5fd266763620e.pdf
    • https://tuzafezinaxav.weebly.com/uploads/1/3/4/3/134319976/15492.pdf
    • http://faxagigotitij.66ghz.com/32120482135.pdf
    • https://static.s123-cdn-static.com/uploads/4450632/normal_5fe563477160e.pdf
    • https://kivuxobusev.weebly.com/uploads/1/3/1/8/131871605/7470216.pdf
    • http://evatopshop.xyz/11911958992ou7r7.pdf
    • http://kixamugefuwa.22web.org/context_clues_example_sentences_answers.pdf
    • http://burivuvuju.medianewsonline.com/cobra_19_ultra_iii_mods.pdf
    • http://astropsychology.site/zurewrsefw.pdf
    • https://cdn-cms.f-static.net/uploads/4486987/normal_603aa64e0ebe3.pdf
    • https://domemasajexal.weebly.com/uploads/1/3/5/3/135304114/7425377.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1fffc21b-ee20-402b-86d5-cfea41ef9992/how_to_start_off_buying_shares.pdf
    • https://uploads.strikinglycdn.com/files/a7b6e9e4-d268-43f3-9279-caf8696a4647/what_is_electronic_media_meaning_in_urdu.pdf
    • http://rufirokexud.epizy.com/benidisolokelogotamire.pdf
    • http://zitadufafasid.onlinewebshop.net/45506934334.pdf
    • https://uploads.strikinglycdn.com/files/a5c78451-fa94-416e-96f4-4c171a07d5c2/74110822933.pdf
    • https://uploads.strikinglycdn.com/files/6a84d234-75a2-44b0-9ad8-737827a689c9/xurizorov.pdf
    • https://uploads.strikinglycdn.com/files/c3eaaba3-9171-436b-a48e-613aff06200b/70164504121.pdf
    • http://suwifubol.epizy.com/canonical_form_2x2_matrix.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010831.bin
bd810e75fed63ffedddc0c2b33930eec1c65b6239a9ca0270b91010e66e67e82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10831 5676 bytes
font_01_sfnt_off00011b9c.bin
8dd3e1b799212336d4be0a9041af79852f0f97d9fb8216d2d73813a1d483ccb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9C 10792 bytes

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