Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d69dc2b3d1a677…

MALICIOUS

PDF

84.8 KB Created: 2021-07-07 08:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f827a1892e2287613bf47eef0f78dd01 SHA-1: 0c1c7c3a7300864726a326cd680846bffc4f23d1 SHA-256: c5d69dc2b3d1a6775e50b1a9c52b65a39d34a42282c0b278da65813a5a99aeef
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites, and contains a deceptive download button lure. The presence of external URIs and links to compromised CMS uploads suggests an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://vytvarnyobchod.cz/UserFiles/File/30340226489.pdf In PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/a803e79cf20bc4dc1d3964e8585cbad5/6309342607.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/xedakaxori.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/a4e29957b73a252342ed7f861ff724d7/90579793494.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/zivowomibarimenuv.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/2g2lo34c650n19mgqbonv79dg1/vebidin.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8392708d7---wiwotuxewanuval.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a28db64f36---89130280048.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/kamudozowukabilisewusilux.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/ribajinusilekolomokekavoz.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1d452a915---33003384615.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/0307e92a6b279887ea40c460954699c9/perotadufopikinelovegojaf.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/sekuwetinig.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/didarafosimikubetunuzoke.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/vokidajifa.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4943f104cb---tasiwiz.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/16157364918.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088572db689c---7636939495.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210609202729206687.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba43d7ca762---sogasobilidapakewobo.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79bbb75c4---79206414472.pdfIn PDF document text
    • https://mmszke.hu/files/file/fegiginefomu.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc509be5086---vetakozevi.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ad2d1193a---jiwewosuduruzig.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/86267858903.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=simple+paragraph+rubricPDF 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_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 10644 bytes
SHA-256: 4b02656d51bb353a4ab0481f21464009d71e4f62651bb1f51ff073aac41b9678
font_01_sfnt_off00010325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10325 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B37 16456 bytes
SHA-256: 8a7ea2ae1ea5e60ebd8460ce3df3797ff534b4b392fee5530a90512df31d0af4

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