Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e7b2abc7164482…

MALICIOUS

PDF

89.1 KB Created: 2021-03-15 01:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6afe1f915b9aa2d1308420ff8c6a1b37 SHA-1: 5eb3b610f6955a4be902aa8828835dc6ad0d7963 SHA-256: d2e7b2abc7164482e262f67f0c9c1060a08ad5b9e4024c2defa8658b7635f3ce
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document exhibits multiple social engineering lures, including a fake download button and a browser extension installation lure, designed to trick the user into executing malicious actions. The presence of a large number of external links, many hosted on disposable domains, further suggests a malicious intent, likely to distribute malware or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 9

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/123?utm_term=cortana+app+apkpure PDF link annotation
    • https://regogugone.weebly.com/uploads/1/3/4/8/134891767/jezefeseg.pdfIn PDF document text
    • http://natur-green.fun/vorupafinosapuseduvagizdu9m2.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/body_rider_elliptical_trainer_and_exercise_bike_with_seat_and_ea.pdfIn PDF document text
    • http://jisutuxoxaza.medianewsonline.com/65202798957.pdfIn PDF document text
    • http://universityru.fun/tiger_census_report_2020dq6ty.pdfIn PDF document text
    • https://xajimamu.weebly.com/uploads/1/3/5/3/135314586/3443339.pdfIn PDF document text
    • https://bukodebavuv.weebly.com/uploads/1/3/4/6/134657655/getepexum.pdfIn PDF document text
    • https://penogefuf.weebly.com/uploads/1/3/2/7/132740618/bepagino.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/28373636185.pdfIn PDF document text
    • http://wiboratiraveguw.mygamesonline.org/kenya_budget_2020_19.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/kewavuvuri.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/21101317952.pdfIn PDF document text
    • https://cdn.sqhk.co/juduxijumijo/dhi6haD/64210912527.pdfIn PDF document text
    • https://cdn.sqhk.co/totimujid/iii8jjA/solabukofegowajezepam.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/zilagekotosemot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofaxafogi.myartsonline.com/nikunamufuvuviwu.pdfIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_b3fffc3682184c67a128d076d89bd683.pdf?index=trueIn PDF document text
    • https://0e627107-309b-4451-a84d-e7064c41fccd.filesusr.com/ugd/04c368_db082d910fe2472ba50e545c0a513b54.pdf?index=trueIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_d33e935e47764db5ba630ec0303eeca6.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_off0001206c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206C 4572 bytes
SHA-256: 20e07c09ccc5f5040541029b73e088ff9d12de52ab2f96182903ef685cfdd36f
font_01_sfnt_off00013006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13006 11188 bytes
SHA-256: df4c86636bcbb932c115f7c1a31b3cb37c8f5a3243c9b83b485653b26ef20d72

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