Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b627150cf86c01a…

MALICIOUS

PDF

78.9 KB Created: 2021-04-01 14:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d6995fb883325c32f07421ec08b5603e SHA-1: 5c5940acb453bcdc4fe1093a69b48a944866cfd4 SHA-256: 8b627150cf86c01a8964911fdb2529a2c2869e948f412b8a0cb41f85e20aea23
186 Risk Score

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://resalured.ru/strik?utm_term=supernatural+cast+season+1 PDF link annotation
    • https://cdn.sqhk.co/dadirowuj/hkibpgg/jezak.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/bosch_khlschrank_bedienungsanleitung.pdfIn PDF document text
    • http://kozoperog.iblogger.org/brooklyn_nets_home_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/YbiarbK/godfather_theme_guitar_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/motuvitewodi/9KPRLmW/70883126249.pdfIn PDF document text
    • https://cdn.sqhk.co/mabisurud/8QijgcQ/chinese_drama_2018_list.pdfIn PDF document text
    • https://cdn.sqhk.co/nidaruzada/iiQ9ia2/word_scramble_game_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/hetihJJ/57513885841.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/53040364172.pdfIn PDF document text
    • http://wajazenizur.mywebcommunity.org/kindle_format_vs.pdfIn PDF document text
    • https://cdn.sqhk.co/fabukujeb/VcTE7zD/watch_free_movies_app_xbox_one.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_62b44cfb0f094456a01cd397dbcad394.pdf?index=trueIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_c51e7a4a067942f985a35e8997215d8b.pdf?index=trueIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_9da4b5f996e94242844f2f1511007bf6.pdf?index=trueIn PDF document text
    • http://favekagopu.epizy.com/arundhati_tamil_movie_climax.pdfIn PDF document text
    • https://394fded3-a37f-45fe-8092-07e0884d2d31.filesusr.com/ugd/bdbc91_bf0f84f951c64d9e8f7d25c1b9741f3e.pdf?index=trueIn PDF document text
    • http://rupesujutiwu.myartsonline.com/search_engine_optimization_basics.pdfIn PDF document text
    • http://gosusalal.rf.gd/99498522932.pdfIn PDF document text
    • http://negifunowulag.rf.gd/nebasurekefava.pdfIn PDF document text
    • http://tititogejeda.rf.gd/biwonolugof.pdfIn PDF document text
    • https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_65f55feed3f947b191674f5962fc9f6f.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_off0000f5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E0 5080 bytes
SHA-256: a94a82afe93671d4d03b33e4623bbe82faddf598595d579831c82434032fc420
font_01_sfnt_off00010736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10736 11304 bytes
SHA-256: fda73a0184a48fb23b378ee6867be941628ff47dd4fd889cb885370cd430c0f1

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