Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3b7e63d9f6b627…

MALICIOUS

PDF

82.0 KB Created: 2021-04-02 06:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7ab7e9059aa9a0855aa164248c6a147f SHA-1: 90719620a9ccf5377c6ca90c759e959653b50e28 SHA-256: 9d3b7e63d9f6b62787e635b592820cedd7028685c4b693e2b900fe61f41568bf
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=fitbit+blaze+charger+walmart+in+store PDF link annotation
    • http://fetedeju.mygamesonline.org/49239233932.pdfIn PDF document text
    • http://mafuditovu.iblogger.org/28297239155.pdfIn PDF document text
    • http://pakunobun.getenjoyment.net/analogy_sample_questions.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/xamumejolubikelibixeva.pdfIn PDF document text
    • http://bupimobim.sportsontheweb.net/33192902252.pdfIn PDF document text
    • http://nulivanofika.mygamesonline.org/71475494399.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bulagim.epizy.com/letter_r_handwriting_sheet.pdfIn PDF document text
    • http://nagudakorixo.rf.gd/puvawesirurodufixoloxesex.pdfIn PDF document text
    • http://movozenumoz.epizy.com/lagamilizogupewanem.pdfIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_c6342871571446aa8d70be7e17adc0b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tenunud/42896747531.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/list_of_information_technology_jobs_and_descriptions.pdfIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_1766082d2b554f1fb9821aecb18cb5cf.pdf?index=trueIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_154e305204c2433097cd97b8c23fe15c.pdf?index=trueIn PDF document text
    • https://f8206d31-21c4-4aef-9da9-e4259ded718a.filesusr.com/ugd/c2bdac_b29b5ead0b794bdba1f686df5d55f9c7.pdf?index=trueIn PDF document text
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_7bfc61d8cc664fc39f29c2693a5d4d4a.pdf?index=trueIn PDF document text
    • http://zobawukesilebaf.epizy.com/koxarurijatuxekewojometu.pdfIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_5c201cad18844788a6ade6f6e4ec63c6.pdf?index=trueIn PDF document text
    • http://petodugutiz.epizy.com/happy_birthday_bunting_printable.pdfIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_7f4fa4e7e57f473781446f53646a7542.pdf?index=trueIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_b5e65b0927494780a827d47d497f8630.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patotale/bezier_spline_plugin.pdfIn PDF document text
    • http://bozitelededenox.epizy.com/piloxapupib.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://scripts.sil.org/OFLIn 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_off0000eb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6A 5448 bytes
SHA-256: ee27e32e3a4b4479f5ed1a8a52bee912a063c4866c5676320e05b5045092142d
font_01_sfnt_off0000fde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE4 11580 bytes
SHA-256: 42f5116f73df2399856cda75edfafdd23e4e02f38c1aa5ff63471f1f8a740592
font_02_sfnt_off000124d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D5 16204 bytes
SHA-256: f04fb96856fa86c99babb5bf309615b780632e07d2318923ed038a7bfd4fd4ce