Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc98a9320778a20…

MALICIOUS

PDF

87.6 KB Created: 2021-07-01 09:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 94e9a15d39553b25d894bf9e0bf9e810 SHA-1: 7aceec10c3142964833c50c6590ff41dcbc12e6c SHA-256: 0cc98a9320778a20df7ccc34d057bf4514a3fd0a77b81bd4f52a468592a4ddec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://myphamlulanjina.com/upload/files/nomipezujananewo.pdf In PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/28881c924b635a92c25ff57bd2617573/25704334.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/fe949d72fdb131c4c33a1b50acf9ac03/6975402012.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/0j1p3akr48d5e504bgvk3i9div/tajunu.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/ur4dtvqk9mr72ks9q3udbq0mj3/mexobekulurewawiwowek.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160743464e3e8c---nabagikepi.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a8399a64b---84924748046.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075bf1a0c334---juvab.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e8e7ceb67---13381353781.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/32316593438.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/f9f59a2fb110bfc30b303dc1bfa71e5c/23364871842.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/159a75bc4c78fc72ac036c8122d67e89/87594530064.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/82010859583.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5dba5c3bd03072b909ad834bdbcd8557/jofofatokukotuzobaka.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/16236301333.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/e21d12ce43478f3f8e5f20581dc88c62/6685089135.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/kaxoboluwem.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/vovujusonasuwakekirebilus.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/73536169558.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/fuwonorupe.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/19407730741.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/60001728175.pdfIn PDF document text
    • http://waterreducer.cn/d/files/58276919622.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/repinetazisaju.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/40076410176.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=give+op+command+minecraftPDF 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_off0000efb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB0 18624 bytes
SHA-256: ab5dc4c1b285ef8e9db5c9a49ad595e92d49b222543de15a43d16cb8e1bd93ea
font_01_sfnt_off000120a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A6 10672 bytes
SHA-256: fb4254390dd052727ba0adaaad46f00ebb248e86c1cfd48d186405e2eea99bd1
font_02_sfnt_off00013926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13926 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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