Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec66f03041b173e0…

MALICIOUS

PDF

73.4 KB Created: 2021-09-02 00:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a1ecb1a98f8c15a659f6fcbebbdb2fde SHA-1: 8d9a680d7f9246ddeb7526686a8adc0972a82b53 SHA-256: ec66f03041b173e09f4940170be75027898adbcd1bab61f6a7208bc9ec930e04
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting domains. These links likely serve as lures for users to download further malicious content or submit sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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://519pf.com/userfiles/files/8378333432.pdf In PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/8de49662e2010981488e0aebb799bcf6/24768019250.pdfIn PDF document text
    • http://bluiettgriffinwilliams.org/clients/2/2a/2accc941c041fffeac9751862bb8fe41/File/kofaxeririr.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/m3iem27v7h05sl0n79u7i417j2/41908864989.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/rozaxidamagafagezofonut.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/pipuketagukejabowugim.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/7pt0r6nni98us6ovs8bl8c0se4/tonuzaxuwepi.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/9c33e6bbf04f9a87b70657bf9ece34f1/disimogonunibojivulidi.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/buvevatetoxopidelivuzu.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/57942710857.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab47bd23dc2---jarupawemikepenubuzaki.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e27b673e68---79166366299.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ea5d7c583---63632059093.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/mepodaluloromadunijo.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe673ed962---zugipikajuroripuzib.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/94373150882.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/bamotuxirikoseto.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/3rvmro2c1b71b2e2gv7c80hini/zobisimamamejoraxo.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160819078256d1---fiwujobopepipo.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/6551589105.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/t07489akfa78m0tjhciatip1qm/kitopisak.pdfIn PDF document text
    • http://oldtimerclub-thueringerberg.at/images/file/nobolabemovuvonigi.pdfIn PDF document text
    • https://ivaco.it/file/nozataz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=easy+cheat+simcity+builditPDF 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_off0000bdfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD613 10648 bytes
SHA-256: c13a5fe4cfc0a4c0e25ca23127bbd05def4a6c7bcaa97624bb1f7ab2943a606a
font_02_sfnt_off0000ee7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7D 15808 bytes
SHA-256: c80d6a068b32fbe568f174e6912d596b5d8155e7377350b8f7bab21cf0dfadf3

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