Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c4e4227994175a…

MALICIOUS

PDF

79.1 KB Created: 2021-04-01 13:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3d86c8f8d2b35fe0a607e3358a2086fc SHA-1: 3735fca0d1ffd0c6bdd9df79945e54dbef9bb4b6 SHA-256: d1c4e4227994175a215b038c42671756e83d3bbaf5e2dfe1aeaa3ff999b62f09
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to other PDFs hosted on various domains, some of which appear disposable. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and extensive link farm suggest an attempt to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://kamijiruwidezi.weebly.com/uploads/1/3/4/3/134387945/teboledibajepe_febevew.pdf In PDF document text
    • http://febirag.iblogger.org/bodyweight_workout_plan_for_beginners.pdfIn PDF document text
    • http://rakojegad.22web.org/carry_on_wayward_son_supernatural_version_download.pdfIn PDF document text
    • https://nivewasivok.weebly.com/uploads/1/3/4/4/134479385/7542751.pdfIn PDF document text
    • https://tivuwamivubi.weebly.com/uploads/1/3/5/3/135384825/doligogomedubew-xawegomedote-rudanox.pdfIn PDF document text
    • https://zutegikovepob.weebly.com/uploads/1/3/4/0/134017150/kopofafipif.pdfIn PDF document text
    • https://vazigawexike.weebly.com/uploads/1/3/1/6/131606690/xekik_jamige.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/KjdSuPfhPRY/wb?keyword=what%20happens%20if%20you%20have%20celiac%20and%20still%20eat%20glutenPDF link annotation
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_27ed048b674b4cea92bdba6f47a0c90d.pdf?index=trueIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_b2a1ce97f9754e6896601fcdb2e396dc.pdf?index=trueIn PDF document text
    • http://fivamoxopel.epizy.com/theological_terms.pdfIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_9ac4b4ff3a3c4052845d1a560e8ee081.pdf?index=trueIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_731abadf7e754dc2ac239846e5fc2b9b.pdf?index=trueIn PDF document text
    • http://xatosizukav.epizy.com/lazewoxukov.pdfIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_5c5867da4a4143ecbafe887785de5285.pdf?index=trueIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_b9a9ef518fd14ae3994d2791a17d1a97.pdf?index=trueIn PDF document text
    • http://lejutijerikav.rf.gd/dobor.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/new_movies_telugu_website.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/tumuponufifukolugixunade.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/56791070128.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_b1001bb4aea74d20bb8150d4fe0bf2c6.pdf?index=trueIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_72708ab8664e4ac4b7702551e3f33fa1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/potofaw/22437354752.pdfIn PDF document text
    • http://mudivakerimenog.epizy.com/dslr_camera_background_blur_app.pdfIn PDF document text
    • http://ximipine.epizy.com/candy_crush_pc_game.pdfIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_9eb5d78d258541fba538d935cddfc122.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/jumezuwejaxotodi.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_off0000f5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FE 5496 bytes
SHA-256: 5d3a2baec2ca28a2e9993fa3d1a3df5f99580388758c49e2cdb9f7633393becf
font_01_sfnt_off000108cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CD 10900 bytes
SHA-256: 1741df4c8ee6ffcbaf301bf360030d17800f018ad0fbcbb4d6d5ffb3166f54c3

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