Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba7ea124401a8fd…

MALICIOUS

PDF

89.0 KB Created: 2021-09-08 23:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e62ee0903c291d9b75d9dfe6982ea45d SHA-1: 0d37951ca8845eb49df113a8ba8bb5c2525d2066 SHA-256: 0ba7ea124401a8fd9d5927fd2a80d2747c561cd9af8f1bcbd2d7c406f0e0fbb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. The presence of 'utm_term=android+run+shell+command+programmatically' in one URL suggests a potential attempt to trick users into executing commands, possibly related to Android devices.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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 http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/cdac4833750a9af1e4840f2bb0306724/57360211153.pdf In PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/tukol.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/20248954339.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/puzovivupixojalisefekap.pdfIn PDF document text
    • https://rossbeede.com/userfiles/file/63524834839.pdfIn PDF document text
    • http://surtek.biz/image/files/20150323_191954.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305eebee2f7---89348342594.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/52118593370.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/vegewikatukonisegumuweviz.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/3b590de2da81e9924f885e8bb8cd4228/vazako.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/gewapuf.pdfIn PDF document text
    • http://worldwidestationeryholdings.com/files/file/nowafumorimodorefezuponuk.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/64743441369.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/44176754040.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/pjtvvo30l2d0i18plmje942su4/87106501397.pdfIn PDF document text
    • http://rococosofa.com/files/files/72617515597.pdfIn PDF document text
    • http://sushibelovo.ru/files/zofumetusenamibawedigad.pdfIn PDF document text
    • http://hijoin.hu/editor_up/nurafuwapuduvo.pdfIn PDF document text
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/zixekapetadelofixuxi.pdfIn PDF document text
    • https://medpressa.ru/files/file/3857512189.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109052306566256.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133495675648---kaxusi.pdfIn PDF document text
    • https://deepex.hu/hirek/files/87559840261.pdfIn PDF document text
    • https://bluetact.com/ckfinder/userfiles/files/tofimalozerika.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109080505003996.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/f90ab45684536c99bff1252024a8e860/10111917182.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/29166312098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=android+run+shell+command+programmaticallyPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF512 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D24 17764 bytes
SHA-256: e2b69449006f94ab9a8fb4f89236632d7ab9fe7c2fbfa1261524241e4d127eb1
font_02_sfnt_off00013bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF0 11156 bytes
SHA-256: 1780b9883f25a625deb356772ef2c34ccff867454200c81b4742ba6039044c91

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