Malicious PDF — malware analysis report

Static analysis result for SHA-256 7181a7d7e86fbec8…

MALICIOUS

PDF

82.9 KB Created: 2021-04-17 05:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2de2254c0d49824b8d6266b002db7446 SHA-1: 84746cbe536b878987d43bf0ec0dbec539080523 SHA-256: 7181a7d7e86fbec8b24c5daa7418102568e2475b47c73642786a68322f2d1ab0
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 0.9992

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://maypoin.ru/strik?utm_term=how+to+use+moultrie+a5+game+camera PDF link annotation
    • http://nijewogifuzazi.mypressonline.com/77032547034.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/mixarafexilorazupobim.pdfIn PDF document text
    • http://basepati.22web.org/nalekojaba.pdfIn PDF document text
    • http://novonet.online/statistics_confidence_interval_9593hco.pdfIn PDF document text
    • http://asta-stroy.ru/71816249834otlbe.pdfIn PDF document text
    • http://insta-sale.site/what_is_the_text_structure_of_the_second_paragraph_jiskhavu3gi.pdfIn PDF document text
    • http://wepovak.iblogger.org/89229633725.pdfIn PDF document text
    • http://gakmancreatures.ru/33623394585yp1f.pdfIn PDF document text
    • http://pogadai.xyz/venoderavogaluwixosegodag2hxar.pdfIn PDF document text
    • http://meetcabinets.xyz/are_dole_fruit_cups_gluten_freebziww.pdfIn PDF document text
    • http://loluxeloju.iblogger.org/rukosodelelusegotupunox.pdfIn PDF document text
    • http://italy-small.space/13092936330dboan.pdfIn PDF document text
    • http://help-igcopyright.xyz/del_arte_de_la_guerra_maquiavelon3unz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tososite.onlinewebshop.net/arithmetic_and_geometric_progression_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f3b2852-bdd2-4c71-8967-4a609f3f8205/make_your_own_python_text_adventure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88cd9de1-9bd5-427d-ad4d-537efd4e9c9d/serta_motion_essential_ii_adjustable_base.pdfIn PDF document text
    • http://rimojiruseb.rf.gd/pikaz.pdfIn PDF document text
    • http://tadufaz.rf.gd/10818729688.pdfIn PDF document text
    • http://futoriw.epizy.com/20011263509.pdfIn PDF document text
    • http://tumupikujam.epizy.com/edgestar_ib120ss_ice_maker_module.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952463df-0f7b-43cd-94c8-a0cec29e2338/sub_zero_650_freezer_not_cooling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e68624-3e86-49b9-bec5-fd8ff1e27055/how_to_replace_battery_in_schumacher_jump_starter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b48381-c409-4705-afe4-8f8696065eb4/wobugakedo.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_off0000f70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70A 5072 bytes
SHA-256: 0ce89e38df6146a50252ac40124bd3da6e85bccd17c74c0a817131ef8d6a4e5b
font_01_sfnt_off0001085f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085F 11136 bytes
SHA-256: 6726bf0632f919fa79bbe5e7d6bb686bc673ff7d11e296749f3c9dd0331e443b
font_02_sfnt_off00012e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E21 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f