Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e16be6f5ab80be…

MALICIOUS

PDF

74.7 KB Created: 2021-03-22 17:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1cfb42e941e3e7f9a13ea752043237e5 SHA-1: b7639dad22c1bbd0e5ef98e0d96ffcc834109ce9 SHA-256: c0e16be6f5ab80bed8e1b90d07ed165739100b040e6febfcd11da699f5aad7a9
156 Risk Score

Malware Insights

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

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 0.9997

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 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.
  • 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://pelibifir.ru/123?utm_term=bailamos+song++320kbps PDF link annotation
    • https://fapopadiwa.weebly.com/uploads/1/3/1/4/131438416/3db5a2fcf10e0.pdfIn PDF document text
    • http://dusejetiwogodad.getenjoyment.net/26737936376.pdfIn PDF document text
    • http://sipidasurow.22web.org/juwoxopu.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/ISST5jg/breakers_resort_rentals_delray_beach.pdfIn PDF document text
    • https://fofumizuzel.weebly.com/uploads/1/3/2/7/132740209/9587040.pdfIn PDF document text
    • https://jitemino.weebly.com/uploads/1/3/0/9/130969659/dafodop_gevov.pdfIn PDF document text
    • https://cdn.sqhk.co/fivodewile/igVifqV/36027144322.pdfIn PDF document text
    • http://xilatotes.sportsontheweb.net/pafeboresunetalokojox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fugufaza.myartsonline.com/is_fasting_really_beneficial.pdfIn PDF document text
    • http://betupaxomivokab.epizy.com/55574410774.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/vegetable_side_dishes_for_dinner_party.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/57556185866.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/accedere_a_icloud_mail_da_android.pdfIn PDF document text
    • http://wewamamewiler.atwebpages.com/79346018146.pdfIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_cb18fc59f9144a058d41cc03481feadc.pdf?index=trueIn PDF document text
    • http://koguxegutoxexu.rf.gd/33140833365.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_ed97e039c6624ad08235f5293b1cc137.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/94392345430.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/doxemora.pdfIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_5ac23e5434c149dc98300a65a6a3ffee.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD962 5732 bytes
SHA-256: 2c67e5de4e2ba29a5ac472b5ffdedfe38473484ba769b75552598b72d4ed0b5a
font_01_sfnt_off0000ecd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD7 18904 bytes
SHA-256: f36ac0cc3b9472c578f329a5a3dae0f25f370b5354b902fff10ff30e0bbf12f0

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