Malicious PDF — malware analysis report

Static analysis result for SHA-256 1070eabf4f3f5289…

MALICIOUS

PDF

113.8 KB Created: 2021-10-16 00:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 50890e24e1b504852590d197377c046d SHA-1: 845dd46dbaebc52bda4202e78c455b8a3acf1e21 SHA-256: 1070eabf4f3f52891df6c65ec42ce8a771d7487d78d45443b9dd5c9f89a85920
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The critical ClamAV detection and the PDF_JS heuristic indicate the presence of malicious JavaScript within the PDF. This script is likely responsible for redirecting the user to external URLs, as suggested by the PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The numerous unknown URLs extracted further support the phishing or scam lure. The file's purpose is to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4177

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://praktijk-fix.nl/userfiles/image/file/85001385.pdf In PDF document text
    • https://ddc-touggourt.dz/ar/files/kemuxogikojujipi.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/d7978de4a86780e3f5f62e7f6816c4c2/29540389540.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/79245793484.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/rutexe.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/59819835084.pdfIn PDF document text
    • http://icoenergia.com/userfiles/files/kedumukovujerutur.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/xinotefogajinopuduki.pdfIn PDF document text
    • http://dade666.com/userfiles/202109file/2021090211582170554.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/94024885211.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/loxexadaxupukux.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/42421949126.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/95429603543.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/33671232481.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20211012171648_pxtdru.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/15670606266.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/11537071878.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/10954153210.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///41915702722.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/pirufelemowexibego.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/73cbe37ba8bffee0cd4ac131baed60f9/34620344163.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/8213118405.pdfIn PDF document text
    • http://hodori247.com/uploads/files/6633454878.pdfIn PDF document text
    • http://starma.pl/files/file/74589117073.pdfIn PDF document text
    • http://sydjpg.com/images/upload/file/20211015_200316_171.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/gaxivenurudisakerexetod.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/TSvcnjQ06Jg/uplcv?utm_term=dummit+and+foote+solutions+chapter+14PDF link annotation
    • 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_off00016482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16482 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C94 19288 bytes
SHA-256: 0f419382a7dac3890dcf363b381e69e2e812ec88f896bdeabf37c5c313a44b73
font_02_sfnt_off0001ae65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE65 11116 bytes
SHA-256: 73d3004d163c41c1dabf7f68e2c4be3e166f394295d75048a0fdc6e0f0b78fe8

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