Malicious PDF — malware analysis report

Static analysis result for SHA-256 eace3e2707fe1f5e…

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 04:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7459676ed1c292e33788e3d25df3ee4a SHA-1: dda3bfe6ba68c372ee0149d870ad502ddff1b04b SHA-256: eace3e2707fe1f5e05c1c22d30a3543160bbd1763c5a66c7921408e94b01582e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The file contains numerous external URIs, many of which point to disposable hosting and appear to be part of a link farm, suggesting a phishing or content-luring attempt. The presence of a 'download' button heuristic further supports this, indicating an attempt to trick the user into downloading further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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 http://seychelles-resort.com/images/blog/file/94022138618.pdf In PDF document text
    • https://12shio4.com/contents/files/jogekoj.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/bf79a9dde791ca465af900a56d1faf66/9927835220.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/77006060728.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/16143084559.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/regetebejizenedazonikeme.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/zodewa.pdfIn PDF document text
    • http://alpes-maritimes.proximeo.com/ckfinder/userfiles/files/49023714864.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/60807223217.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wuxovelilupepamifigonujur.pdfIn PDF document text
    • https://yennenga.org/business_school/uploads/file/94000631385.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/nurite.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/9106066219.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/539784290.pdfIn PDF document text
    • http://www.luna1956.com/images/library/File/65218016749.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/bufavapererakibibuxixim.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/69860266887.pdfIn PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/9724048395.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/xutikefenurigugavuzelana.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/161384617b7e22---detogaxupujipeganada.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/bowiwuker.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/64797056561.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/81458585751.pdfIn PDF document text
    • https://armenia4d.com/contents/files/68574118806.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=gta+5+apk+obb+file+download+highly+compressedPDF 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_off0000d872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD872 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 18448 bytes
SHA-256: abfedef32e77942e0ff594387e84ef0a1cafea072831ef6543b6a81cdb1bca2f
font_02_sfnt_off00011fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE1 11672 bytes
SHA-256: be16fc86a822049c5f598310cb5471d8718f7899703f61afdfc0d72bb4dd7859