Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82a69975b882cbb…

MALICIOUS

PDF

74.3 KB Created: 2021-09-11 21:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f62e884596d13ea8597f112662ce1ab4 SHA-1: 847133fdd184826c0fd10b6d3de3178e3843b56f SHA-256: f82a69975b882cbb86b587cdd324380cca1284a89caeb750151aa880cbdd2b40
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with 'utm_term=apk+among+us+free+skins' suggests a lure related to popular games, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://nieruchomosciprzetargi.pl/files/file/32863423013.pdf In PDF document text
    • http://ljsmelt.com/upload/files/57301510376.pdfIn PDF document text
    • https://netlandschool.cl/files/42284592262.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/321229489.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/90341356861.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139591227bfe---71111892691.pdfIn PDF document text
    • http://esangsok.com/upfile/files/repodusu.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/suwunesojuxibenupidudi.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/79853210926.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/kegozidimizutezulosama.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/27503709577.pdfIn PDF document text
    • http://gensugroup.com/upload/files/luxam.pdfIn PDF document text
    • http://essiac.cz/UserFiles/file/54697691352.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/61316174b5616e75015c454664dbaad5/86481394520.pdfIn PDF document text
    • http://enricobarraco.com/files/gigutabemule.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/juladere.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/c577ab2afbdeffe61df8695d40bbce08/jemovupesalab.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/20196291280.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/19104948242.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/50f137906926d35b13d727ad8a013655/38672232303.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/lipeted.pdfIn PDF document text
    • https://museuminiaturesbesalu.com/files/serapav.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/wemofi.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/vudonuzuraxoxurugonabudik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=apk+among+us+free+skinsPDF 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_off0000c1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B4 10732 bytes
SHA-256: e998c33904ac8836dc2f73382c8770ecf2cc0062d39b0b01489c09efbb74b36a
font_01_sfnt_off0000da67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA67 16204 bytes
SHA-256: c7f3c49d757ba6258643d5e0ee436e72a006b3d800c7023f8a31b56e454adae2
font_02_sfnt_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.