Malicious PDF — malware analysis report

Static analysis result for SHA-256 11199333e953db60…

MALICIOUS

PDF

82.1 KB Created: 2021-09-17 23:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 493fd6b1b3c0e982d38f176815a52b11 SHA-1: 9f4fab5941a4f8cfe1919499e45e4db30025b618 SHA-256: 11199333e953db60c5c0bc6824160934f8f77b2bbe51811c9962c7584ea95f12
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or scam attempt. It contains numerous links to disposable domains, suggesting a link farm designed to obscure the ultimate destination or host malicious content. The presence of 'utm_term_redirector=True' further supports the idea of a campaign leveraging tracking parameters for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • 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://everestlodgelukla.com/userfiles/file/subexinunuwomilegexupazo.pdf In PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/neririsilonopununamenur.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/72983539846.pdfIn PDF document text
    • http://knipia.com/userfiles/file/dowapokutijijipuma.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/garewifefogijeko.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/25231616798.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/21841245529.pdfIn PDF document text
    • http://findusafranchise.com/files/files/27965334051.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1612f967384fcd---wafinadobomolasivoxilaxe.pdfIn PDF document text
    • http://houselandia.ru/files/28240695057.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/zitagalabiluzubarapube.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/13790640991.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/wezofibesavagajojafazel.pdfIn PDF document text
    • http://komodovo.ru/upload_picture/watidozumonuvemelonebosis.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/tusevezezorerumeripotef.pdfIn PDF document text
    • https://sgotomotiv.org/upload/files/24183593444.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/zisaja.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/balobiduzikake.pdfIn PDF document text
    • https://12waktu.com/contents/files/11256718613.pdfIn PDF document text
    • http://warmistore.com/userfiles/file/xukesamulotimu.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/roxidozanilepopowowiziri.pdfIn PDF document text
    • https://mmtours.si/uploads/zepilunaf.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/kadusowepexalexenemanamik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=lego+boost+apkPDF 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_off0000d8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F0 19256 bytes
SHA-256: 2b39151723923a2bb0e0a45f050e38c8d9a47f457f7c9f19e60585e4bbc9d716
font_01_sfnt_off00010aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C5 10276 bytes
SHA-256: c3a03e9f44eeda310806f812d5eba4ee39bca18e1193dbb22fc8058452f1551a

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