Malicious PDF — malware analysis report

Static analysis result for SHA-256 b107b1c9f3954d7c…

MALICIOUS

PDF

75.7 KB Created: 2021-09-04 06:34:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 00ae964550ef37b4b10913d30cab7ff4 SHA-1: 0c22261c7325307e46a0318b3924aef0405de3bc SHA-256: b107b1c9f3954d7c053ec2dee8753581b4e20a14428cbc504dc900ee357c72b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, forming a link farm. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content. No scripts were extracted, but the structure suggests a malicious document intended for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://allytemp.ru/uplcv?utm_term=fluke+287+service+manual+pdf PDF link annotation
    • https://emmaushuis.org/pages/fekomemaxisuj.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6b50a08cd---63043837976.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/30653887106.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/1ee55226d563aaaf1b86048a1df4fe13/metopamitamo.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/79j19t6ips6p9ov6u366ptnnts/jonavazuwafetama.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/de67487287e0a73490e6a0b70ccb6490/58375419885.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7779ddefe5---18706401610.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/f49ie3rgqq52cdl7jdimvs8053/92999289589.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/78195993260.pdfIn PDF document text
    • http://sentai.cc/data/file/20210814_234732_523.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074a94325412---35691336184.pdfIn PDF document text
    • http://minerva-collection.net/files/files/nifasoruxigamoweveru.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/25098475390.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/56558370828.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/bugitafijabovoko.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5d356ddac---5755256775.pdfIn PDF document text
    • http://www.ks-zahnarztpraxis.de/upload/files/tiwetedemulom.pdfIn PDF document text
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/zumigaxo.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/uq6kpk823gohmp7fudp0pc5f37/joramusiletepedowopi.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/miteluvizitolal.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d40bdc107---foxadiwof.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/adce62e637519571a2fcfa0c3070cfe9/64706647188.pdfIn PDF document text
    • http://rotang.net/userfiles/file/83734947132.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607de31fc8678---wupoxokugojazak.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_off0000c412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC412 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC24 16364 bytes
SHA-256: 6f308f4a2fc2ffeb67cacedee51da55c55c5ce162629295210d7606a5fdfd64c
font_02_sfnt_off0001066a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 11176 bytes
SHA-256: 2c6489045674a3c727a9700f0de4ba9a85d8b2f94c7edb3764eeaab258029295

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