Malicious PDF — malware analysis report

Static analysis result for SHA-256 fddb4c6e3a22b88e…

MALICIOUS

PDF

89.0 KB Created: 2021-08-16 18:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b4a4c17d9f6c621cc0ee5190afcf98a2 SHA-1: cfabae61903342801274a8910faf164899d9f0b1 SHA-256: fddb4c6e3a22b88e318c62df56805520824a3a1ae44884262fce3294a8ab1fdd
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm directing users to numerous URLs, several of which are hosted on compromised WordPress sites, indicating a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://goldendazzle.com/upload/quangtri/files/fiwiwupezunitus.pdf In PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fd82decff---vibopedilavivilus.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/3tvp1banv65argvnohspmstc8g/musetimekofupunuwewuvores.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/datasawibibuwiripiso.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/kepikavulafexabovej.pdfIn PDF document text
    • http://chipgene.com/image/files/20210813_200733.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/nedisaxokajakutokizifev.pdfIn PDF document text
    • http://staropolski.net/Upload/file/48675330026.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/18076114268.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/jazapisukomosaparotemak.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/161066f866e4de---fefozaduzugoketijexuroxa.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/2f28379a66ba9272381c411f14b45bee/dajop.pdfIn PDF document text
    • https://luminex.pl/upload/file/vuxotubixebogukewez.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/a034f8332c630c69ec2d054df21e5dd7/99047527486.pdfIn PDF document text
    • https://osakadentalcare.com/contents//files/pewabomawebuwo.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607705ef3aa0f---74584271766.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/23557147058.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083acd17cd60---98034049137.pdfIn PDF document text
    • http://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/sawarijik.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/kogewinetoniserifit.pdfIn PDF document text
    • http://bio86.fr/fichiers/bowajixoregitiwa.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/147583829661134a982c0b0.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/l5viduio0nim1lr88cjojodakq/68215295565.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=diferencias+y+semejanzas+entre+los+diversos+g%C3%A9neros+literariosPDF 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_off0000f296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF296 18100 bytes
SHA-256: ce67b03aec7e3f753ffeb2d549501d425e2901f5f117a76a1c265108087aa07d
font_01_sfnt_off0001207a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13891 11344 bytes
SHA-256: 2e596487caacb1d9d5581b6635baaa14221f11db6ee8b27d0172a555fa71c913