Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8e60570132e643…

MALICIOUS

PDF

83.2 KB Created: 2021-09-15 13:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b5154441a5572dc7b307be441d80a32e SHA-1: 6697fcd93c0370fc402f2e935906d101465bd300 SHA-256: 0a8e60570132e643b4c5c61e79a5ae9341236dcc02c4f2305f78d43fe5ec26ad
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress uploads or link farms on disposable hosting. The ML classifier also strongly indicated maliciousness. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer, likely to facilitate further exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a1a010905---73619062105.pdf In PDF document text
    • http://insightonafrica.in/userfiles/file/jovigorimunemepalakukezes.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/nipeluvakesa.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/72bv9ei6fr5pi0v193he0k7t54/64857692089.pdfIn PDF document text
    • https://mauspro.net/upload/files/9047733260.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/36228811015.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/lipaxijoratazi.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/90afd8c30e05e2a3e68f27a643580db6/98632617758.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/dofirelupikupaxorezanafod.pdfIn PDF document text
    • http://rrarental.org/upload/file/95414623304.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/93873151001.pdfIn PDF document text
    • http://cautrucpalang.vn/webroot/img/files/6718081401.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/75202021074.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/xiwekun.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161344cc916929---nawimoniwomemojot.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342243f37b6---bevut.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/joxoraretejedi.pdfIn PDF document text
    • http://precisao.net/files/files/wamamoxenemusaxogugidi.pdfIn PDF document text
    • http://dayuntang.com/assets/uploads/ckedit/files/20210911221424.pdfIn PDF document text
    • http://topp.pl/_topp/file/88833157048.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/265b44b30d827aa6e29b2956c596eb1a/63340844779.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/sijiwuz.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109030459006849.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210908_DA9D99A08054B226.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+recover+deleted+files+in+android+tabletPDF 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_off0000deda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDA 18228 bytes
SHA-256: 13256f58f0d4509183611ba26b3d5bf218dc432b568640068db39a6229f1387a
font_01_sfnt_off00010df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF9 10752 bytes
SHA-256: 19949fb137ea32ca15c3b8b0ccb407f959198fa4b45098c35a9ddae7d111dbd9
font_02_sfnt_off000126da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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