Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7d6e46be82f6c8…

MALICIOUS

PDF

82.7 KB Created: 2021-09-05 21:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 219ab35a84c250c38aa018d147636ec0 SHA-1: 6ee2331a9f64faabed9ad3bac4eebe4bf8e827fa SHA-256: be7d6e46be82f6c8d488bd0817e738b1a5987b1b5a3c7cf4d10c0ff7babead38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, hosting numerous PDFs on compromised CMS upload directories, a common tactic for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's part of a larger attack chain, likely leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://kredoteka.ru/uploads/file/2107860338.pdf In PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/873ub18bd31norphnnv1cqalr7/89790981331.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210704_095444.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fab8ee19da0---65208390537.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/25338959138.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/77956101483.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/27644095698.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/xazoruzudowapekogazikufi.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/ee8c123fc2c9569ed66073d35358e87f/17418194784.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/83083759641.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/56920564416.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/730b36d554eaa90dff1af497c434a0d2/dofixabebiselepow.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/buzina.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986d134e531---83271526556.pdfIn PDF document text
    • http://sino-web.net/filespath/files/20210813182554.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/43293109885.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/nosufipefofofilediw.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/7638edad19142bdbe61f399f658f3308/42081546235.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/wuvix.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/92a8587efcfde0657223f1fbc4dcb8a0/79541984708.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=ftp+linksys+pub+manuals+befw11s4PDF link annotation
    • https://lapdonline.org/file/80820560068.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_off0000de0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0D 10940 bytes
SHA-256: 8ca49064b394abaf039688f9b1d1aae55dd71c52ee71f512348dbe711d502fde
font_01_sfnt_off0000f752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF752 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F64 17596 bytes
SHA-256: 00d47925ad4337045f060f4f703e73d676979ddfe78ce4cd879346ec3c62360e

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