Malicious PDF — malware analysis report

Static analysis result for SHA-256 6806d3e0e87b2115…

MALICIOUS

PDF

119.2 KB Created: 2021-05-12 07:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d1d00115a34dbdb9216e788aff991b12 SHA-1: 305574df66883f95c616f3dd2a8e969f5e4d7037 SHA-256: 6806d3e0e87b2115f74f50c082148d1e17b283af8ac3cce37381f3b643936b85
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or phishing operation. The embedded URL and the document body suggest a lure to a page that likely hosts further malicious content or phishing forms. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/strik?utm_term=how+do+i+change+the+audio+output+on+my+samsung+tablet PDF link annotation
    • https://cdn.sqhk.co/wejafivelij/ggtvfqt/7535366180.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/ifibidx/wadumipavaparuda.pdfIn PDF document text
    • http://kakorezikudu.mypressonline.com/ielts_band_9_speaking.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/hhbFhjb/black_forest_cake_photos_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/jjrggKW/real_driving_school_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/r4hjwgg/5942118364.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/jBjjAhe/basketball_kings_multiplayer_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fojevimexu/fidjbzn/vapoli.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/jiBgcNZ/3d_mini_golf_challenge_mod_apk.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/52848093112.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_b8778e7a5d974a3988d91ee985f44e48.pdf?index=trueIn PDF document text
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_b4f2a9d6c63c4a47a4ffdb7e4d751b9b.pdf?index=trueIn PDF document text
    • https://0115c081-d8bc-4983-a705-81db93bf1442.filesusr.com/ugd/990402_4c8562b05cdf43f29e041e1c4dbddf00.pdf?index=trueIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_fb0f8b35bb334d328fa5c192ccddf96f.pdf?index=trueIn PDF document text
    • http://gototura.myartsonline.com/bitexoboval.pdfIn PDF document text
    • https://67389751-14cc-4ed3-b660-7ef7239e4cc3.filesusr.com/ugd/bb5584_91ac2df21d02473e9be51eff66efff71.pdf?index=trueIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_d96227b7c00b450887308510f5a41165.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/formule_dveloppe_cyanure_d_hydrogne.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/kirby_sentria_operating_manual.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_3636612de71a47d3af5a8177a26168a2.pdf?index=trueIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_691ff58ddb0b4c84926e401946eb91d4.pdf?index=trueIn PDF document text
    • http://juludiripo.myartsonline.com/13982041906.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/web_browser_vpn_apk.pdfIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_b11ccf0b940942a4b10a6cc2b4e59183.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_off0001956c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1956C 5688 bytes
SHA-256: 69e52996811e1f8f0abd743e5c14da8f00f5843c659eb819657e55e1165b49ef
font_01_sfnt_off0001a8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8B6 11292 bytes
SHA-256: 27c9f05f0486ab857a89e3f95166b5c54d9825841bb0e955cb48fe27a442f5ad

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