Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6fdd43c9bf033b…

MALICIOUS

PDF

80.7 KB Created: 2021-04-01 03:39:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e219c9b37394fdd0e76bf08f1cbad57 SHA-1: 770db525655250e465b080c694292b1f8baaf6ba SHA-256: eb6fdd43c9bf033b4af345c90d117fe7dfdf8d0278b62e8dbb8db568e859ec7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF documents on different domains. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous external URLs suggests an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=knowing+god+ji+packer+pdf+free
    • http://italywow.space/dazodafunegobogaragerem34r5o.pdf
    • http://cardioactiveufficiale.site/apprendre_dialogue_franais_gratuit2fedk.pdf
    • http://belldiscount.ru/310417374047oc6z.pdf
    • http://55571.ru/415661140075a5e3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://7e574f8b-ef34-4833-8dee-b18f3ac9fc91.filesusr.com/ugd/af8ffd_6455e0038a3e40d38793942ca407ef4c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d9364403-77d1-48c5-a2cc-f847842fc03c/kenmore_water_softener_manual_400.pdf
    • https://uploads.strikinglycdn.com/files/616a9afc-748d-4969-9ca2-1df0c8970580/5_examples_of_figurative_language_in_marigolds.pdf
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_55742ecf980349f98ffaa639b61d8e52.pdf?index=true
    • https://uploads.strikinglycdn.com/files/db6776d7-3549-49e8-8518-ed1517a59fca/wurelofopulozofowu.pdf
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_f4c7aa0b94844c39a26bb0671555c82c.pdf?index=true
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_0b5861b52ae24b2da47861492f167642.pdf?index=true
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_d5791d588442434ebcdf34dad135e87f.pdf?index=true
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_9b46e4fba2314d2b8083a041f2d1323b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/450e616a-bc9d-4b8a-aee1-ab13f58ef6da/bergeys_manual_of_determinative_bacteriology_ninth_edition.pdf
    • https://uploads.strikinglycdn.com/files/b8f33e18-cdcd-4a36-b1b9-71467ea25c56/hp_photosmart_d110_printer_not_printing.pdf
    • https://uploads.strikinglycdn.com/files/7b9e3de7-ec33-4243-960e-4b766ee905f4/59255688141.pdf
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_aafdf39b397f4ae397f313e513e7218a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b391aaf5-59fe-44b1-9ff2-f3fd6abdf11e/fawadonovolarudagupadene.pdf
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_d69ed686ece14e2d8e36c4c77cb270fd.pdf?index=true
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_4ff6c8e3bf3b445a83f29de558122369.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f290.bin
1dee25381205a92c3192b79deea6a18de43438c3edf50a118837285cfcf72814		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF290 5020 bytes
font_01_sfnt_off000103bc.bin
7b68b43001b2871ff41a2594d6f3414014a8e062166b3a82c7943f0725ce260c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103BC 10404 bytes
font_02_sfnt_off00012700.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12700 4324 bytes

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