Malicious PDF — malware analysis report

Static analysis result for SHA-256 6243d5c5a380ca7c…

MALICIOUS

PDF

75.4 KB Created: 2021-03-24 00:57:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ad6f8b609c57c8edc2d62f16979c3135 SHA-1: 9c70d6704fd3e76cb530b2cef93198b6c8da1ee3 SHA-256: 6243d5c5a380ca7ca208630e8abd41c21b22b8f33e0255b1b8e119073048adcb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

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://ponafet.ru/strik?utm_term=political+philosophy+the+essential+texts+3rd+edition PDF link annotation
    • http://dirupomavi.iblogger.org/twitter_lite_apk_new_version.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/wQpvja8/jesuz.pdfIn PDF document text
    • http://nubilofanekib.mygamesonline.org/la_casa_de_bernarda_alba_acto_1_vocabulario.pdfIn PDF document text
    • http://kalanuso.iblogger.org/how_to_troubleshoot_a_air_compressor.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/92634327684.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/chi_health_center_omaha_hotels.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/sifOsZO/54161568841.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/jhjeGih/game_caravan_war_mod_apk.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/attacking_faulty_reasoning_download.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/i9uhfii/adidas_outlet_sale.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/sajezife/mazojuxoferewozuzorete.pdfIn PDF document text
    • http://jiwositefikeb.rf.gd/splinter_cell_chaos_theory_ps2_guide.pdfIn PDF document text
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_f4d96991b1004774959bd08681a75f90.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/risisipajole/critical_ops_hack_apk_data.pdfIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_9df11b71255b424c862a4e0b8928a67a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fexuror/88280407654.pdfIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_054912b2ba1946bba6112b08def0b9ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/battle_trip_episode_114_sub_indo.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/brochures_design.pdfIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_0715ad430d8e43a9959978ff080b076c.pdf?index=trueIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/how_to_use_white_house_apple_cider_vinegar_detox.pdfIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_1d9b2ed502e941f5a1bb5487aca0128c.pdf?index=trueIn PDF document text
    • http://julugupebuje.rf.gd/50842544696.pdfIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_4c64c6ffd69f4edb87e24e5fa51cfefd.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_off0000e92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92B 5496 bytes
SHA-256: 4b50f78a56765293d931a5a4dc2e0de40649ceff9ccc9e10f8c4441794668b09
font_01_sfnt_off0000fbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 10488 bytes
SHA-256: aa2c87472570608686c9433040b0a03a663ce753962eea71d327064f5a317b4f

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