Malicious PDF — malware analysis report

Static analysis result for SHA-256 48065a1452ec3242…

MALICIOUS

PDF

76.5 KB Created: 2021-04-21 12:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f523ae44e172a601a06d09a6c07f4fa5 SHA-1: eb0646f0415cf66471a7a238ee142f81e500720b SHA-256: 48065a1452ec3242dd7e2c553493e773f50a96b084de214ed0bf52bf9546b5b8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The document body, though partially corrupted, suggests a lure related to 'Ugly's electrical reference in spanish', likely intended to trick users into visiting the malicious URL for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://dafemum.ru/strik?utm_term=ugly%2527s+electrical+reference+in+spanish
    • http://shothard.site/ccitt_compressionejkp2.pdf
    • http://niluwipewuxasa.medianewsonline.com/baxunovogidubekigizo.pdf
    • http://gnfcns.info/pbisworld._com_check-_in-_check-_out_forme0j0k.pdf
    • https://cdn-cms.f-static.net/uploads/4458849/normal_60417f0be25ca.pdf
    • https://cdn-cms.f-static.net/uploads/4449776/normal_60316eda3f246.pdf
    • https://cdn-cms.f-static.net/uploads/4472506/normal_5fd3a64c1e59f.pdf
    • https://cdn-cms.f-static.net/uploads/4377908/normal_60111ba24055e.pdf
    • http://bisibometixo.mywebcommunity.org/84949649412.pdf
    • http://fotonagosuslugi-01.space/action_plan_templatergoi8.pdf
    • http://zujuzerawijuk.medianewsonline.com/37877539214.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/87ac99ad-1064-446d-983c-7f1d8fe51971/best_engineering_drawing_app_for_android.pdf
    • http://gumizaxewa.atwebpages.com/shark_rotator_vs_duoclean.pdf
    • https://uploads.strikinglycdn.com/files/8bdd1dc5-10c1-4b2b-9191-ed9b3e723515/jumusirevu.pdf
    • https://uploads.strikinglycdn.com/files/9b5fa3f3-591c-4e3a-b961-3854ed17bdb4/5th_grade_opinion_writing_exemplars.pdf
    • http://patudesaruvob.atwebpages.com/bhature_recipe_in_marathi.pdf
    • http://tudaxaj.rf.gd/jisitimujuvukulemoxenader.pdf
    • https://uploads.strikinglycdn.com/files/33bd4a67-4a22-4224-8903-4094589950bd/wordpress_username_requirements.pdf
    • http://jebowozuguvufot.rf.gd/write_an_inequality_in_slope_intercept_form_for_the_graph_below.pdf
    • 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_off0000e994.bin
8ded77b7e08f3ca3543ee9ef6be4c048f45f432d46d4c909eb36f5f7d6e3036e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE994 5404 bytes
font_01_sfnt_off0000fc0d.bin
763bae0ea24e34499de07d7c1035602563cb9b05e97969486b00af70467a0be6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0D 12032 bytes