Malicious PDF — malware analysis report

Static analysis result for SHA-256 70143c0502235538…

MALICIOUS

PDF

82.9 KB Created: 2021-07-22 21:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 64bd6e4388498b5f339997d7008671ed SHA-1: ed3c3cc78a621e7e7a20264e07d62f0fcf2f545b SHA-256: 70143c0502235538e6c17575e602a42a94b0576143fe7771f2b1774e78bbe062
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites.

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 https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/2de44732e5bcb65e34abb348d8520152/tiparo.pdf In PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/67044925066.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/xuworukiduvugogajejof.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaaa03149b---kinukudatorate.pdfIn PDF document text
    • http://mlkscholarshipsmilwaukee.org/clients/f/f0/f021f13c5c598389be7e913a1ae626ff/File/36887347643.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/cc46718a991f8b4938cfafe44442579b/bekafagurimoraxo.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/lupipiwusekofamifokisil.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ea0c18707---68008648030.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/puzamagumiwivibupu.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/82539179039.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/77460478312.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/859a4gbjr41jbdd6j9uvog60u2/98883627065.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/90227799950.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c888850a0d---82729907805.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/1528808892.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ce6bda0a4---63045789232.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/xejusosomojivakuwe.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/2d36f9783a0df35c4827e32343a7d019/10140692221.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/fa68f8cfcab545b2e3f5427d1ca8e3a1/nelegimazukisomu.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce7033739b---27765903563.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/36937f384435f26a0a4a135404bb7b34/50682022526.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160716fd08e113---26695056320.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/55709948291.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/gasatewanos.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/5resuo0f437gdg1k4tslft9u04/46376616067.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=career+objective+for+call+centerPDF 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_off0000e364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE364 10528 bytes
SHA-256: c1b4d8dad2e0c9878aa176498b88f668ce3497efd4aa99e8741f80eb409578ca
font_01_sfnt_off0000fb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB76 16092 bytes
SHA-256: cd5fb920e3d69d8c5eea127fae9922aa2e264edd3ec8176def2cdb2c6f2a97cc
font_02_sfnt_off000124da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1