Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff212496eb216f6…

MALICIOUS

PDF

107.1 KB Created: 2021-08-26 00:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ab8dc2570e5338f1edf044fd797cf18e SHA-1: c99684d54475f25b840c7b20ce8eceb4878b8d78 SHA-256: bff212496eb216f6c09ad39a391323e90324e9533c6c2c5432fed2e773ff61d8
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised WordPress sites or disposable domains, characteristic of phishing campaigns or link farms designed to redirect users to malicious content. No scripts were extracted, and the document body was unreadable, but the heuristic findings strongly suggest a phishing or link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://queure.ru/uplcv?utm_term=analyze+text+structure PDF link annotation
    • http://paoladebenedetti.eu/userfiles/files/38559945751.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/luxizile.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609693a61290a---vogojixob.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610aba74aafa6---gipiv.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f6e720636---buzaxubakoram.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/9e568a97fe6f132ad0ef156d0d692e27/32693133702.pdfIn PDF document text
    • http://thepnguyentran.vn/media/ftp/file/51768407151.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/3347013828.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///fanaxopep.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29d70d73c6---zukudejulod.pdfIn PDF document text
    • http://hiddenroots.org/clients/19739/File/78583537497.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f5f51f80b---43550231825.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3639e186d774aab92b343f962bbff6e2/jirus.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/pegowadovajo.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607607fe8c9a1---6210141090.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/10282509863.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcb2ce4adc---xukabajotad.pdfIn PDF document text
    • http://cobmedia.hu/include/tixodexefe.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/fb2e245920b02226dc12b8a1fe5035d4/86398533491.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075fe1ae1fbb---batirumazexoliz.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/kugif.pdfIn PDF document text
    • 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_off00014045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14045 10368 bytes
SHA-256: 3bd287251e1096eb6fb22a25b8a2fc8a2a775bd87142a21b67c5985201b5b9ed
font_01_sfnt_off00015803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15803 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17015 17628 bytes
SHA-256: 70257ac7bedb5290b4b0c8c45814f1c53e648b973188eec01bc24921a832cb82

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