Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af7bdecc42acf08…

MALICIOUS

PDF

68.1 KB Created: 2021-09-28 07:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 30389ae545bc969d02199f93ae1a9498 SHA-1: 93e4dcca3dc1c490f7047d14943501be3765ca32 SHA-256: 2af7bdecc42acf08f3a521c01435ca14f509e990888b1a992c85618da94864d6
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, directing users to potentially compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using non-clustered links on disposable hosting, suggesting an attempt to obscure malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://drafthe.ru/uplcv?utm_term=simcity+buildit+pc+hack PDF link annotation
    • http://dierenwinkelindex.nl/images/uploads/xebexosatavezazopife.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/62249426753.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/13540401914.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/47766120959.pdfIn PDF document text
    • https://value.ae/userfiles/file/pijononinila.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/4896585053.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/22199680117.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/224e165a83cdb1c0db3b1dee07e35cd4/tebagod.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a20cf61e2f---98871126372.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/voxujogolivikazefas.pdfIn PDF document text
    • http://associatedreclaimed.reclaimedoils.com/userfiles/files/35967781134.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/36935196038.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146d5ec27767---56787711685.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/71852827399.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/f9215ffcc90bf30d2812943ce188c6f6/56935371893.pdfIn PDF document text
    • http://mdtrend.hu/files/file/lakatobibixigisekas.pdfIn PDF document text
    • https://legacytwirlers.cornerfamily.com/userfiles/files/13377339008.pdfIn PDF document text
    • https://fasleh.net/Files/files/65202522721.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/19904140116.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210908213141_1737541539.pdfIn PDF document text
    • https://www.netcorp.hu/data/editorfile/66473375571.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210914203258.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_off0000ad78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD78 14924 bytes
SHA-256: 36e679416d85bec164eff85f040b45689da3fb783d6fdb7ecb9cb9ebd724a660
font_01_sfnt_off0000d30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30A 10676 bytes
SHA-256: 49617ac8209d2c8af8d6cf3b9633c71bfce3c6a27be2b4c4a461a6ce855687f4
font_02_sfnt_off0000eb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1