Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9d68ef026442c3…

MALICIOUS

PDF

104.3 KB Created: 2021-03-11 10:08:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d075ea28d178cea404bdf230ad237b3f SHA-1: 1cdf90e6ac4dc62571788505225d420b967f6c61 SHA-256: dc9d68ef026442c3e37e93f377f2e9d6d464b25886c5f1e689f6b00c0b0f3f2b
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary external URI pointing to 'https://seumenha.ru/strik?utm_term=honda+tiller+fg110k1at+parts', suggesting a lure to a malicious site. The PDF's structure and numerous links indicate it functions as a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/strik?utm_term=honda+tiller+fg110k1at+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460241/normal_602066a5b5336.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487424/normal_6001c52cd31d6.pdfIn PDF document text
    • http://sekevekamide.22web.org/tetukuxodudizomanomivalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428033/normal_5fe69dfbc7aab.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/living_in_balance_session_19.pdfIn PDF document text
    • http://girepodemaz.getenjoyment.net/principles_of_agronomy_free_download.pdfIn PDF document text
    • http://jemulobapamiwu.mywebcommunity.org/clases_de_servidores_pblicos_en_bolivia.pdfIn PDF document text
    • http://zabodolodak.iblogger.org/how_to_use_canon_sx530_hs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bupojawepuda.epizy.com/77746020623.pdfIn PDF document text
    • http://gixisenusadat.rf.gd/timenuv.pdfIn PDF document text
    • https://a44a9d9e-3ce9-422e-9b5d-83ef2d4925cb.filesusr.com/ugd/3234e9_8adea7ca9f0741ad98b737573fa0a201.pdf?index=trueIn PDF document text
    • https://95a83a18-022f-4aa5-9dc2-588eac4c5c4a.filesusr.com/ugd/ccb6ab_ead319598dbf4d14ad25f19626735583.pdf?index=trueIn PDF document text
    • http://dimexibagumaza.epizy.com/xupojuwukupizovenoluxidow.pdfIn PDF document text
    • http://faleferesevo.onlinewebshop.net/2005_honda_odyssey_shifting_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/352e808c-0eb9-4e7e-94f9-080a53c2d54b/rheem_gas_furnace_not_blowing_hot_air.pdfIn PDF document text
    • http://lolunoxij.myartsonline.com/xadidod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50106e05-083e-4405-88b7-41c4b8d9ce7a/twisted_tea_alcohol_content_tall_boy.pdfIn PDF document text
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_2c683501e28d49279ac0cb464d6c20f1.pdf?index=trueIn PDF document text
    • http://nerepigov.rf.gd/85893323650.pdfIn PDF document text
    • https://b4095e1f-5e43-4c35-8b28-ff0c3185c247.filesusr.com/ugd/9cc3de_fffe23b781f941acac59a5a6d206827a.pdf?index=trueIn PDF document text
    • http://fosufozixa.rf.gd/77306565352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15011ab6-e385-4424-a89c-afef973080ac/how_to_replace_ink_cartridge_hp_deskjet_2620.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0D 20208 bytes
SHA-256: ab77739831c3e65b204c267d9dea49edc0cee5db3248ff380ab8b57b7f7da104
font_01_sfnt_off00015c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C35 5428 bytes
SHA-256: 103bf9b30f5546a8eb9a7833e541a24a962a05b458c1ca243a6482f47992ed88
font_02_sfnt_off00016ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EBC 11072 bytes
SHA-256: e498b90c3c22c8ea724fc7c436ad46e55bcaa1218d5b862df8a781937cbc5d0a