Malicious PDF — malware analysis report

Static analysis result for SHA-256 56759bd0166a7c63…

MALICIOUS

PDF

90.5 KB Created: 2021-03-12 19:06:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fc403ce14a3aa8516878e5ef9f2be69 SHA-1: bbd0b9a883fd20464b84e9b9a2817ea0fb073290 SHA-256: 56759bd0166a7c6341e66f8a29ea5b482edbec452440e7c84d6889582bbe581e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are likely part of a link farm designed to direct users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scam purposes. The document body, though heavily obfuscated, suggests a lure related to obtaining a driver's license.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/aws?utm_term=how+to+get+a+driver%2527s+license+in+georgia+at+18
    • https://cdn-cms.f-static.net/uploads/4482228/normal_6009b525df5fa.pdf
    • https://static.s123-cdn-static.com/uploads/4465018/normal_6002ed55b7db6.pdf
    • https://cdn-cms.f-static.net/uploads/4418973/normal_601470c7a3c1a.pdf
    • http://fezanabuxa.22web.org/assoluto_racing_apk_data.pdf
    • http://bogplaktnc.fun/xamaput6g9r.pdf
    • https://didokizobu.weebly.com/uploads/1/3/4/7/134711826/jelepanagosalu.pdf
    • https://cdn-cms.f-static.net/uploads/4477183/normal_602c146e4085b.pdf
    • https://fugurisugo.weebly.com/uploads/1/3/6/0/136086283/7292578.pdf
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/6392248.pdf
    • https://cdn-cms.f-static.net/uploads/4444096/normal_5fe6f4ef2b4b8.pdf
    • http://my-favshopd.online/mitologia_griega_para_nios_medusaiodlm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://be8f41f0-9ddd-434d-ab6d-aa755a40b80d.filesusr.com/ugd/726d9c_3bd33b5bb54247e0954016bcf01cc1de.pdf?index=true
    • http://jowunimigafej.rf.gd/28734837591.pdf
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_c63389db3c2b4c888ac1de782f7f8feb.pdf?index=true
    • http://lodanije.epizy.com/put_simple_past_tense_form.pdf
    • https://5e1449e8-5ae4-4a15-bc7a-ee23795bc964.filesusr.com/ugd/3a34a5_56ced3d6b567488d9c75b184f579ceaa.pdf?index=true
    • http://bomepexajusopa.epizy.com/punuj.pdf
    • http://daguwirebumovo.epizy.com/english_grammar_exercises_quiz.pdf
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_c09a023983c0426a9681587b423eb5da.pdf?index=true
    • https://1160a196-6e18-49bd-931c-438029629b47.filesusr.com/ugd/40338c_3894bf1c0b2248a790d5cb3c41ffc577.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001216d.bin
689ccb69b12560901e560530798b718af6f8c4993dfea690be2c0ad9f85fbb3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1216D 5500 bytes
font_01_sfnt_off00013459.bin
6cf03a0e142d73acd33b8ed8856f1c3c1bbfd6f64269b89f6a56689db0f7eb85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13459 11764 bytes

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