Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fdbd30b5310d196…

MALICIOUS

PDF

80.2 KB Created: 2021-09-08 06:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 25954664fcf33339b610a86ce28df454 SHA-1: 53598d9d6726d935a15d164e3288711e1e780f36 SHA-256: 5fdbd30b5310d19635702947c4c2ada0d392eddb93214f2f9fab2424b78bbd62
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://catgarner.com/clients/873270/File/votuzovodevozuj.pdf In PDF document text
    • http://bhk-aindling.de/userfiles/files/buwinowebagefovo.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/xowumuguzikokofon.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/b4d9737234c0e9ee539deef40e72b4a6/66134113046.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ip2i23s2imv9l91m30fqh4mqig/tixavurufufofazik.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/f108fcc278978cb1335ace280df2fe5c/48548980594.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/10014868152.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105e30b1ece1---47303228842.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/legudepepu.pdfIn PDF document text
    • http://annabarons.lv/files/files/dovoveneremamunum.pdfIn PDF document text
    • https://mobilpetrol.olajpark.hu/files/files/luvafafefeloveforug.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/66372951760.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/77975408239.pdfIn PDF document text
    • https://egf.tw/test2/images/file/rifosugufatefurizokef.pdfIn PDF document text
    • http://packturf.fr/files/85940466754.pdfIn PDF document text
    • http://floramarble.com/uploads/fajulunekafolekufudet.pdfIn PDF document text
    • http://faradbox.pl/files/file/84305874565.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/de361ff91e72feac1d6feadb4f3caa94/puwukanujovukadefage.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/razulu.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/femadimililolozisepe.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/nirijemogitudafadumenaxib.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/nolanajugefunomaz.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/81992418123.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=xcf+to+pdfPDF 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_off0000d8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FB 9816 bytes
SHA-256: 469ce17d95cc47268a2a16d96b6cf5ded139386c79a3f366b418c5ba01d95ca2
font_01_sfnt_off0000ee96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 17628 bytes
SHA-256: 39bf6473350ae763506b925cf48de9bbb69bf38ae122383b10affa2a6507dfc4
font_02_sfnt_off00011c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1