Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08cfa5c4295b454…

MALICIOUS

PDF

80.4 KB Created: 2021-09-24 04:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b2015b29d09038fb367f4c69fb1d2080 SHA-1: d651b74cc482ff52422ca90253d2769dd112e2e2 SHA-256: e08cfa5c4295b45407ffff10d81396bc08601cce20aaf3664cf5969ca8d7c1c2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs and a heuristic indicating it's a link farm, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports this, indicating a lure to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://huntic.ru/uplcv?utm_term=mod+apk+zombie+hunter+apocalypse PDF link annotation
    • http://www.polni.si/Images/files/tekutu.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/poxiditupija.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/vuzomonit.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/91647208665.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/laloxudipowevivotevu.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/82515150516.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/48275133469.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/jodokotivorovo.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/filozezeripedibakive.pdfIn PDF document text
    • https://yunglin.com/uploadpic/files/12565791691.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/77707783514.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/soxedavinefeb.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/161409fcd1f9e6---56670341273.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/51033852558.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/80551727139.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/kujewagiduvutugolidurot.pdfIn PDF document text
    • http://apothepharma.com/upload/files/49448036425.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///rulibirakagodepotu.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e21b5de9f0---zapusovofeguzugibuwa.pdfIn PDF document text
    • http://www.mab-solutions.fr/upload/file/93887081119.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/daxomip.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/60834443996.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/35287780867.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://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_off0000d220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD220 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA32 18268 bytes
SHA-256: a4427442e4379b66f11c1ebce278ee66511931d254996d24a7fad9b85f64ec43
font_02_sfnt_off000119b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B2 11280 bytes
SHA-256: 6003edc2794cb46789c103905716f73ee7e5597996b8116e3850ae190020b9d6

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