Malicious PDF — malware analysis report

Static analysis result for SHA-256 faab2d719daf38ba…

MALICIOUS

PDF

75.4 KB Created: 2021-09-05 03:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5eedd06ff66bf4410b76edd7993702c2 SHA-1: f862ad0d66aef109def082880706e701c89fa701 SHA-256: faab2d719daf38ba69a1f19a3c180552596560c94ff183afb35d47fce5c6b2d6
116 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as compromised CMS uploads. These links likely lead to further malicious content, such as other PDFs or executables. The ML classifier strongly indicates maliciousness, and the presence of multiple links to potentially compromised WordPress installations suggests a coordinated effort to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e8ec0b732---jadanobolumemelelofunado.pdf In PDF document text
    • http://solarissoft.com/img/userfiles/files/39027047659.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/eho65ftldovs8f32rmr7tu62fv/riluxifufaxexowafegatobo.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8420f47e03---wapazabapatekugudadopi.pdfPDF link annotation
    • https://walnutcreekguide.com/wysiwygfiles/file/meravixunujozokudujesuw.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/c3epq3jjoo1sf21ibi1e9lsmpb/13973571626.pdfIn PDF document text
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/90203735917.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/mepefetunerogupebiwuxel.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/76e29316a704651a8410b7bf1e2c62fa/pewis.pdfIn PDF document text
    • http://apcmagon.com/userfiles/80566105332.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894c80bac5d---74339081821.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/lewubazivilufe.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/49690701676.pdfIn PDF document text
    • http://teresachild.com/upload/files/23284850816.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/29220758909.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/822321603.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/18024285688.pdfIn PDF document text
    • https://unosms.us/userfiles/file/43281112304.pdfIn PDF document text
    • https://actor-conseil.com/files/file/dikokupefojezumoki.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/lgu1qb0rorr4erse6t6915kll9/wisuxubalemefatokipemobul.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/b75029a0ecda8a1d5a09000e69e48ebc/58875629294.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/c009945cc938e7debe3db830a9a02992/64950568612.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/39805103784.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160841b25ea89e---bedoze.pdfIn PDF document text
    • https://soechi.net/userfiles/file/91896203731.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=manual+de+uso+gps+garmin+64sPDF 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_off0000bfc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC2 17660 bytes
SHA-256: 561cebb2e3aa115f98955031c033a862d9fc9d18581ac838e44f09615b43d107
font_01_sfnt_off0000ed63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001057a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057A 10976 bytes
SHA-256: 92449c3013c8dc2ffd5700febd59550e666bc9eec25193a42004e799c0a442aa