Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44efcfd818db070…

MALICIOUS

PDF

79.1 KB Created: 2021-03-10 10:16:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4345050a147e911e703290d0e65c7a80 SHA-1: a1b63d6c25c1b73b08d159a23daeba4690f1c358 SHA-256: e44efcfd818db070042c35ecc2f27d739a1622f69b5758f7347e53e4d20b9726
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.7876

Heuristics 4

  • 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
  • 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://dafemum.ru/award?keyword=alimentacion+y+actividad+fisica+durante+el+embarazo+y+lactancia+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481988/normal_5fdf79d8daaa2.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/78368197382.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/dojugafimajexofugife.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402722/normal_5feb6c9636f61.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/pioneer_sph-da120_factory_reset.pdfIn PDF document text
    • http://talajudoxuxip.mygamesonline.org/kezikivevagegavenuzikas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_60205c6dcfbe2.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/introductory_mathematical_analysis_textbook_solution_manual.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/5977716058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_6031ecae12019.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/de_que_ao_se_puede_legalizar_un_auto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445573/normal_5fee550dec3df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_6016455b386fb.pdfIn PDF document text
    • http://datiwufirul.medianewsonline.com/when_worlds_collide_sequel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473062/normal_5fff7519a4490.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_0eee29778c22423a98e5c8b3c9d62071.pdf?index=trueIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_9625bd48cfb542af90215b07442b4c7c.pdf?index=trueIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_c37faaab420e468b8318d781fd8b31c3.pdf?index=trueIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_0fda381709044d2f8ed569bca0d82edf.pdf?index=trueIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_e2657a9e6e5f4296bb3aa9843f8bd4a0.pdf?index=trueIn PDF document text
    • http://zugepoguj.onlinewebshop.net/58030536410.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11454 5640 bytes
SHA-256: ea0784b6beb06651929ddf729e7ae2420c51b79853b31ceccd4b1728c6a399d6

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