Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5162c1b883ef8f…

MALICIOUS

PDF

95.7 KB Created: 2021-03-20 00:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 77a9ca96db11b195eda55b8ea15596f1 SHA-1: 8ca310de2344faddc423b9b712d067a9edb96678 SHA-256: 2d5162c1b883ef8fbcde475d074d64abd08c6a2adde140f279f025700a8126c9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to disposable domains and Weebly-hosted files, indicating a link farm. ClamAV and ML heuristics flagged this as malicious, likely due to the distribution of potentially harmful content or SEO manipulation tactics. The embedded URLs suggest an attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=argos+guide+to+mattresses PDF link annotation
    • https://luwidejike.weebly.com/uploads/1/3/4/8/134881341/fakapovada-sigewidojixo-sudetebovenoxor-nenabeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_6053326967536.pdfIn PDF document text
    • http://jowivuv.22web.org/xbox_one_wireless_controller_power_cord.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385620/normal_5fdc2ebfc1e91.pdfIn PDF document text
    • http://liketsven.xyz/7511901251t8f2m.pdfIn PDF document text
    • https://tudadakamoziv.weebly.com/uploads/1/3/4/5/134596668/1811887.pdfIn PDF document text
    • https://pugufatafa.weebly.com/uploads/1/3/5/9/135967981/8937952.pdfIn PDF document text
    • https://xizadububexo.weebly.com/uploads/1/3/4/5/134595199/9e493b.pdfIn PDF document text
    • http://reduslimitalia-official.site/best_music_player_for_android_no_adsd4vak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485572/normal_5fdc074a07c89.pdfIn PDF document text
    • https://lokugejepotag.weebly.com/uploads/1/3/4/3/134318746/2331749.pdfIn PDF document text
    • https://zobegutibeg.weebly.com/uploads/1/3/4/9/134902349/tajekebivo-sewegesopitow-tifumat-tozopuwukiwe.pdfIn PDF document text
    • http://fusitekive.iblogger.org/1996_ford_ranger_xlt_engine_3.0_l_v6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_602f73bf9a0ea.pdfIn PDF document text
    • https://rabunuzo.weebly.com/uploads/1/3/4/5/134502988/sijaganat.pdfIn PDF document text
    • http://itawegan.space/englander_pellet_stove_manual_55-shp106rm7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2627b92a-5ecd-46af-a9d6-712d565700d5/casio_illuminator_touch_watch_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8d6087-aead-45e6-ba1a-09b1be35a57c/does_suntrust_bank_do_wire_transfers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1325b275-0e70-409e-ad93-e4efc6c16a5d/48279566496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae33c82-cdfe-4792-a793-474667c17094/siemens_plc_programming_tutorial_for_beginners.pdfIn PDF document text
    • http://wilafeduzavedew.epizy.com/what_is_community_service_short_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ceed98d-496a-4787-9e44-7d362cecd90a/fowokewagizanalobuwatibo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A1B 5104 bytes
SHA-256: 285af7525bccdef92a9a939dfe703471ba6e082e6d5c6984d2a09e1397125be0
font_01_sfnt_off00014b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5A 11284 bytes
SHA-256: 3ce811d5cd95b5b5d793b96e17fcbb3a6ff7066ddef85ca88f0651270b97d1a6