Malicious PDF — malware analysis report

Static analysis result for SHA-256 675a49b4645ac59f…

MALICIOUS

PDF

82.5 KB Created: 2021-09-10 07:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 57f199d0c255478ce69aabc0bca385f6 SHA-1: 1e74912847f3f3e6975973df8e6af83708b63bca SHA-256: 675a49b4645ac59ff52b00a60cc3da0d225faa2a8a16c325de87a6d4e900e516
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to multiple domains, some of which appear to be compromised CMS uploads. The ML classifier strongly indicated maliciousness. The presence of a 'Password-protected archive handoff' heuristic suggests the document is intended to trick the user into downloading a password-protected file, likely containing a malicious payload, after providing the password instructions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://telektrans.hu/editor_up/63205115750.pdf In PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/kepowazejeradak.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/85254358046.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/28552501430.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/73961134766.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/37448220433.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16133d808a3cd8---39587733743.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/sovaxuriterozimut.pdfIn PDF document text
    • https://ozanetiket.com/TasarimAcarnet/serhali/upload/files/dikapunosoval.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/23985854735.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/34584949476.pdfIn PDF document text
    • https://laser123.com/geektic/files/temewegagesonove.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/xevemudimaku.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f2b19410a---69830822664.pdfIn PDF document text
    • http://tianlanip.com/filespath/files/20210908140714.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/jabipelixaj.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/sinewixalulus.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/sezovovuset.pdfIn PDF document text
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/bugajomu.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/vedimutomujusefajagubiv.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/45868023964.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/25785cd23cc7dac100c066c72d197105/6236166663.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/mopinewila.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/49485974665.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/dujikelusubegol.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/55883427643.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=icloud+login+email+androidPDF 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_off0000dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF580 18184 bytes
SHA-256: 3fdbb28cd91b86b19887080bf596819048dfa45d6731ec78f26b308b7f85ba55
font_02_sfnt_off00012468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12468 10496 bytes
SHA-256: d5813a3f1205e515f56ff75be9491bb8f60770a98073f9be2850c199231710aa

Open this report in the interactive analyzer, or submit your own file for analysis.