Malicious PDF — malware analysis report

Static analysis result for SHA-256 da12d20ee412bc2b…

MALICIOUS

PDF

68.8 KB Created: 2021-09-30 12:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c024f2a07011c3fb28ae8443c065287e SHA-1: ac75c1229d11510146a90e7bd861912e44cc9437 SHA-256: da12d20ee412bc2b8b7b3162c090adc5d98fa84881ecc98cc2c5c298aa075f83
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous links pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content or download further payloads. The document's structure, being image-heavy with minimal text, strongly indicates a visual deception tactic to encourage user interaction with embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://geo-equipe.it/userfiles/files/87031708432.pdf In PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/dca33e7fa70d129c190709c1f404b022/94558778586.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161477660f408d---86259102990.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/2118852464.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/18020468380.pdfIn PDF document text
    • https://inunekocp.jp/mailmagazine/upload/files/kalidomabemevenajiwiwumez.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/2a24a970d1aca0d4f8ae649c1eb91031/79511079891.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/93199338004.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/wavif.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/43759193177.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/fiwodedovunam.pdfIn PDF document text
    • http://indexone.ru/upload/file/78022037518.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/11373381916.pdfIn PDF document text
    • http://www.hausman.eu/images/wyswig_images/file/mubetuzekupe.pdfIn PDF document text
    • https://menokatea.in/ckfinder/userfiles/files/voxajixozujudi.pdfIn PDF document text
    • https://felicityokolo.com/file/28259239521.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/59809078083.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/pekoso.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/39795839165.pdfIn PDF document text
    • https://rm-parketi.si/uploads/31856565149.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/sukodutadikeb.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/54516913006.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/db5c26473ba485497455a4f725b77919/35343205234.pdfIn PDF document text
    • https://natinsel.com/imagenes/file/75360075449.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=redmi+note+9+proximity+sensor+settingsPDF 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_off0000ae8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE8D 14500 bytes
SHA-256: a0de6dd38d927c6ce55ad0290abd59280e14b92c696fd25100b2eed0b8db868a
font_01_sfnt_off0000d2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ead5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD5 10956 bytes
SHA-256: 05a751479fbf95aa9334a87b7b13399f146c4f07b43a972a6608ed75194d2620