Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaafc459e7208b72…

MALICIOUS

PDF

81.4 KB Created: 2021-09-19 05:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ff724360d2bc81e06c317a5424c2c6dd SHA-1: 96d3c9f57dfe19d3629f1937f8f0b9d7db30f9ff SHA-256: eaafc459e7208b72b5ef9a654068ae8248ca9eaa52a0aa4742658919efe772a0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple disposable domains, a common tactic for distributing malware. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download an archive and provides a password, a method to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://rrarental.org/upload/file/fosukebemetufadarugi.pdf In PDF document text
    • https://webtechnocrats.com/upload/file/lolixevuto.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/pududexujegilisewuxawib.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/ginufusatufopumuteju.pdfIn PDF document text
    • http://sun-dr.com/uploads/files/202109160401517020.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/fuwogekimozipefo.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210913140438.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/88830061374.pdfIn PDF document text
    • http://pokrowce-ochronne.pl/Upload/file/26450475113.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/29021756222.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/0e60e995ee6b7d521c919f1b8a5c8115/59217773489.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3c2f1885b---kinutevetip.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/mezurat.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210914_3175EA7B8DA99836.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372aa03c498---tikokumazaniwijekog.pdfIn PDF document text
    • http://zhatuogz.com/uploadfile/file/39381572668.pdfIn PDF document text
    • http://inistor.com/ufiles/files/81960111914.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/18984802146.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/45178832643.pdfIn PDF document text
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/pivas.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/pitijusufegavesapitodari.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/nijakoxenuxipopegibiraj.pdfIn PDF document text
    • http://talentfuturesservices.com/sharpinstitute/images/files/wiribaxofabumofelu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=gta+5+apk+pspPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 17508 bytes
SHA-256: 412db8a96fc15c8efcd582b52e0d791023d18d754529e6ac0ef0d759aed281c8
font_02_sfnt_off000121f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F9 9916 bytes
SHA-256: e75f4475498e705f39aff2eeca2bd683d2c9cc48667175cc79b445f2c128d265

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