Malicious PDF — malware analysis report

Static analysis result for SHA-256 7908609de6dfed11…

MALICIOUS

PDF

79.6 KB Created: 2021-09-17 23:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 28f4b817285ecd2271613c89d4df0875 SHA-1: 6252b271ee8334c70d9c922f0be7d0d1ab278c5d SHA-256: 7908609de6dfed11241a49eff6fae26c563ed428ed116502a16fcc5f83694faf
134 Risk Score

Malware Insights

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

The sample was flagged by a machine learning classifier and ClamAV as malicious, indicating a high probability of malicious intent. The presence of numerous external links, including one pointing to 'allytemp.ru' with a 'photo touch retouch apk' term, suggests a lure for downloading potentially harmful software or engaging in phishing. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick users into initiating a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://allytemp.ru/uplcv?utm_term=photo+touch+retouch+apk PDF link annotation
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/wigimoka.pdfIn PDF document text
    • http://net-marketing.hu/images/files/53774268933.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/75494698403.pdfIn PDF document text
    • https://actionsporting.com/userfiles/files/vemujipolizu.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/54390491502.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/161392919b3891---fejezivifarelozutex.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/dixovo.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210908232819.pdfIn PDF document text
    • https://photofetimages.com/70236922770.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/filisaxurumikekafile.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/pureger.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/lalunujasisejidizagita.pdfIn PDF document text
    • http://goldmustang.ru/files/files/94382300032.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/83db46b80d052719342b240564d0f1c7/64781385191.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/gupefinowezizefagasabe.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/92042379190.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/xenusetovufozisovufezudo.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/rijenetafaxepapevene.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/riwabuxuwonirapapalupivel.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/59638203501.pdfIn PDF document text
    • http://vegman-kzn.com/ckfinder/userfiles/files/92659839438.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/43678315595.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/kunevukepisofagekodi.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_off0000d6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE4 16528 bytes
SHA-256: e4a1c2b8bdb96cedd8aff76a2ae9f3cd80291b8bcfed113bb23fe334460be775
font_02_sfnt_off000119eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EB 10252 bytes
SHA-256: 2bd8c63c00e7dd6d2d1d9901735d97a8c45cb22092e4d61fd5bf9cad45ff6b45