Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b07dc22d1b393f…

MALICIOUS

PDF

90.5 KB Created: 2021-06-27 02:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b6ec0488d3e103b9a33438a7a6d0b657 SHA-1: 7b48ec9bcd2ca642ce40009e48169340e1f8d29c SHA-256: 01b07dc22d1b393fcc8419063e6ec9ec00b8ef463560f44767a9202bc4994ddf
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting. The embedded URLs suggest the document's primary purpose is to redirect users to external malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://chcial.ru/uplcv?utm_term=blood+thicker+water
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/r3i509dpmiok0msdbtjfsf564q/94900204435.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad675fb996a---bepakupilofokezuza.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/lpbq2u2od82sk71d01mejieh05/24473726248.pdf
    • http://beastyenergy.com/userfiles/file/10470394421.pdf
    • http://suamayin.biz/userfiles/file/84627198270.pdf
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gekejitipixeto.pdf
    • http://dok-vo.ru/userfiles/file/78027302593.pdf
    • http://roxburyhs1987.com/clients/63080/File/98475511457.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5bcbb672f---keliduve.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609883be44eba---bajuzowirutufalineta.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb31c8470d---12717250617.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/dusorujujix.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/gkd1ceb2sst59qn17fbdv0bnbd/zejowaluvowigeg.pdf
    • http://faradbox.pl/files/file/44876890264.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/uhfmp2jh0e34gcldp2lpde9i8h/nejemomusovinazivoderatuj.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/xozekajokalejaladesariwib.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/j2b2d2j8ig960t3dgeef5sm9br/70789287050.pdf
    • http://residencecarlofelice.com/userfiles/files/simexabamalelikabogotato.pdf
    • https://rumahbaruku.com/contents//files/pamuget.pdf
    • http://gtshotel.it/images/file/49049285208.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/0f24fd1dbe500bc16035bae08aa391de/36850025951.pdf
    • http://pallenberg-busreisen.de/uploads/files/xutiruf.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/848d5ed949e420a1dd2b92ebd5a5dc8f/towaresisokexevevisukewe.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfaa4826ec---90691229128.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c73caea87e7---39849537269.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff0c.bin
afe823dea6250d18bfeafd729bca770bc159dc92e2b0c163e9146b547c277ac9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0C 10424 bytes
font_01_sfnt_off000116e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116E6 16792 bytes
font_02_sfnt_off00012ef8.bin
0d9b3b8444ef163e3d7b01ad5b02a12e42449bd61e8b93155dc29f07d7fdf627
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF8 17544 bytes