Malicious PDF — malware analysis report

Static analysis result for SHA-256 3196e34a6ecf0d10…

MALICIOUS

PDF

90.3 KB Created: 2021-03-17 17:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: becb8866b723b777048ab1cd61792bcb SHA-1: 60852af63320ba06c0dcd85cfe6046a4dfe08ea4 SHA-256: 3196e34a6ecf0d100b934c9377987a1181ace9c60a53f8454712d458bc85b9c6
186 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs further supports this, likely serving as lures or part of the redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/strik?utm_term=fender+mustang+amp+v2+usb PDF link annotation
    • https://minomawisagu.weebly.com/uploads/1/3/5/9/135956859/1267313.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/dafoseku.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/1056155.pdfIn PDF document text
    • http://vifubavawet.mygamesonline.org/bezonesotesatupoxo.pdfIn PDF document text
    • http://esmoney.site/how_do_you_clean_a_hamilton_beach_flexbrew_2_way_coffee_maker3al8u.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/lajonizen.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/selixix-gojokix-fenesud.pdfIn PDF document text
    • https://telewebejuta.weebly.com/uploads/1/3/1/6/131607630/deleki.pdfIn PDF document text
    • https://xoxudepibedewem.weebly.com/uploads/1/3/5/3/135317482/ruxalosag.pdfIn PDF document text
    • https://letolikasepa.weebly.com/uploads/1/3/4/6/134625664/dovatuzaxovogud-pasobosajekoru.pdfIn PDF document text
    • http://pop-marketplace.ru/13826858148re2nx.pdfIn PDF document text
    • http://subonus.ru/the_last_song_elton_john_karaokehgd3g.pdfIn PDF document text
    • http://resapus.scienceontheweb.net/70793811028.pdfIn PDF document text
    • http://zathkatow.xyz/cyber_discovery_assess_answers_20181b1tq.pdfIn PDF document text
    • http://espaceclient-cmb.com/nizabamavaresaruleynai8.pdfIn PDF document text
    • https://jipafevumo.weebly.com/uploads/1/3/1/6/131636956/loxorizisemaze-luvilerojegavug.pdfIn PDF document text
    • https://palukenibimel.weebly.com/uploads/1/3/4/4/134401756/5cdf914020.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/sefiwegegagu/710626997.pdfIn PDF document text
    • http://fozipifi.epizy.com/what_does_the_wps_button_do_on_a_modem.pdfIn PDF document text
    • http://bumusilofinufaf.rf.gd/how_to_make_poached_eggs_in_a_steamer.pdfIn PDF document text
    • http://buwomir.epizy.com/kodipofolusugebaj.pdfIn PDF document text
    • http://bufagefitazi.rf.gd/kaufland_letk.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/1298114732.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/cen_tech_7_function_multimeter_manual.pdfIn PDF document text
    • http://wiwabapanap.epizy.com/difference_between_binomial_cdf_and.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_off000114e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E1 5536 bytes
SHA-256: 9ea020b87f901a87a4c98b294630cd99f8496ea15dde2a3648ef462a3c9f37e1
font_01_sfnt_off000127a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A1 16268 bytes
SHA-256: 063328f416158eb0d080576fecc6690e36ada187ffd2ef585e862d2b4b85c01c