Malicious PDF — malware analysis report

Static analysis result for SHA-256 a189604fd981c187…

MALICIOUS

PDF

82.7 KB Created: 2021-09-07 20:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4c08717b65697b596c65a7ec21ae3f02 SHA-1: ba836dd91b7f42c4c69e0b10ad17a586a1ca799a SHA-256: a189604fd981c187099b5e8de33232c2adb0aa9f709417d4cc668b5759b0ad53
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on various domains, some of which appear to be compromised WordPress sites. The primary purpose seems to be directing users to malicious content, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://derkwoo.com/upload/editor/files/25340052836.pdf In PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/59169937972.pdfIn PDF document text
    • https://curtain.jinware.com/upload/files/beraniza.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e6e44ca655---81392814472.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a83833c96e2---64192870569.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/74923386888.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/vowubadatejijugudoji.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaf5798f03---jivejiz.pdfIn PDF document text
    • https://cubic.is/userfiles/file/jilupiwaxamikuf.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/89386945426.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/161010aedb781e---felojepu.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fee854196b---28317681877.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/54429957503.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/revujuwupufetazavujadew.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/kotodiwinevuxonifer.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/kowatesulesakatulixave.pdfIn PDF document text
    • http://master-vin.ru/files/file/dolevavuxetezoni.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/afb8716928bb171532dfaaf0fe1d2ad7/nadure.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/32004610089.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/likufupezav.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af78bea6d6e---mukomaken.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/36dbe0eb82d72c86964e14311c5bba58/4074479858.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=libro+de+esteroides+anabolicos+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_off0000d8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F3 20128 bytes
SHA-256: 1ae49e53e502155446c58e972c82b394157b0654bf71268c15ff8a71e0ecfc10
font_01_sfnt_off00010caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C1 10708 bytes
SHA-256: 554c183111a30fd622a3223ecd104f8e035239650e3344d5bdd0b2478c45fd6b

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