Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba677bc1d703a84a…

MALICIOUS

PDF

86.0 KB Created: 2021-09-19 05:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 64543b841685e4178490ef038a0ab9d7 SHA-1: 39769a3b408387a9d7876eb047ea46adfe59b211 SHA-256: ba677bc1d703a84af750c690f98a74d2de63e2e59a1154ff9dd62bbed6bac622
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Numerous embedded URLs point to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The `utm_term` parameter in one URL indicates a potential lure for game-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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 https://crewmak.ru/uplcv?utm_term=asphalt+9+legends+mod+apk PDF link annotation
    • https://marwaservicecenter.com/nbloom/fckuploads/file/dufilifetari.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/losapabupodugubame.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/zebami.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/41860578184.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16132b1080b58a---jejivinale.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/fipujarizoxavuguxudanemal.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/12622902308.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/80250405534.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/70423741246.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210908073401.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/56923368324.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/78265788288.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/piwofizitabirit.pdfIn PDF document text
    • https://satybharat.com/ci/userfiles/files/420150719.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9b471f398---binomagulasag.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/nevulagijifuna.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/88131023629.pdfIn PDF document text
    • http://jumpstart.mobi/userfiles/file/ledaba.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/384469febab28e44e7ed7da64ef7894e/kufule.pdfIn PDF document text
    • https://thehouseproduction.net/file/95661781316.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/kanerikabula.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/vatidikukutuluwezabiv.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/datonet.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/59340548829.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC861 10888 bytes
SHA-256: 31ea95b2a554a2de7d519f6d7a63d9d004e1c93919b8956eba733d2353c69bf8
font_01_sfnt_off0000e141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE141 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 23188 bytes
SHA-256: 9acb57d9a6f2e98a008efdf83f52a74e6cacb17dbe803395d7c09dcb649f235b
font_03_sfnt_off00013333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13333 16380 bytes
SHA-256: e62cca045312918b292d130d6dbdb9eee357ae8462ef5226f02e869bf229e283

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