Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15e879c46ec313c…

MALICIOUS

PDF

84.3 KB Created: 2021-09-10 03:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d56b6e1209d63dd68b56e1480e044f01 SHA-1: e214c23fea2c39b9e2bb639024161ac934345ad3 SHA-256: a15e879c46ec313cfa5d56d91e3bc4d8d1f20101f48489405bd337de71d94107
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. Heuristics indicate it functions as a link farm and contains a lure to execute commands via the clipboard, suggesting an attempt to trick the user into running malicious code. The embedded URLs likely lead to further malicious content or payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://crewmak.ru/uplcv?utm_term=adobe+after+effects+cc+2015+crack+only+download PDF link annotation
    • http://zhjpharm.com/upload/files/ronix.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/xuzabajilesesod.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613825b0233fb---52620037079.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/wivasoniko.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/lagabuwixifamovesit.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/wobamiki.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/solofagamelowixesan.pdfIn PDF document text
    • https://kueapem.com/contents/files/10099924648.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/tawamidiri.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/4b2143395e957fe7c30299a1b60f84ef/vibonididamoke.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/rubadeperiran.pdfIn PDF document text
    • https://alohasafaris.com/files/24188544725.pdfIn PDF document text
    • http://a-pluset.com/userfiles/jominukewowagu.pdfIn PDF document text
    • http://ttfi.org/app/webroot/userfiles/file/63845483171.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/52940078373.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/zolimesibe.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/1473226671.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/15104547533.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/34311364579.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/bigijeniwake.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/jagafuxadoza.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/dotexexinunala.pdfIn PDF document text
    • http://kunbot.com/upload/files/bumivekuzumes.pdfIn PDF document text
    • http://olivetheater.com/userData/board/file/28386213164.pdfIn PDF document text
    • https://maciejabramowicz.pl/upload/files/file/74669093420.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_off0000dda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA6 11220 bytes
SHA-256: f16ecbc6df7f2d6e67ff20d590597c9a87c9683e7df1bbd917dbf24fa1032c71
font_01_sfnt_off0000f853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF853 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11065 18624 bytes
SHA-256: ec855d7ffbd4fe8982571736066c28ff35ab5d41843fb8169ad2590b61ee866a