Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7b085e3e281d56…

MALICIOUS

PDF

79.9 KB Created: 2021-09-07 17:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 56e624b85d60ef9293eaf34b019855c2 SHA-1: 0fd6fbfbde0ac0447355a694fd243f7e75c551f2 SHA-256: 5e7b085e3e281d56bbfb15e2ad43c1864198225bf5b5aa367f5634c5e4fb7901
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 https://inwebjor.ru/uplcv?utm_term=lister+petter+ad1+parts+manual PDF link annotation
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ctipdaupgtq43drfn1fihgb9m9/vopeberodonowejizukofewa.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/67800715793.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160baac684d230---fosupodamizivaset.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/53101237881.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/32276922892.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/deflchi8p9qmlj7om9es0m3d2b/40652445557.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612afcce482dd---muritunez.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/wavexudikoxaz.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/41731139645.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/4v87j6osko4g6dnskcu966pnf5/kixajujuwuzej.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51cef6fb87---33970184936.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5f3f91b95---zegevowegoxesexepew.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3992b5a60b---79740907778.pdfIn PDF document text
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/turetapelilodulebarofa.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3775e60c8---vuzovemom.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d15d3126e3---mipuditavabodedugoped.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/10043ee128bebab57c2b21922c88aae5/noxenide.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/metaz.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/29933756311.pdfIn PDF document text
    • https://sangolongphuong.vn/longphuong/news/files/lakidi.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/9fba4690cb067782d98d51643cf548df/ziziwijexas.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/rilabufitu.pdfIn PDF document text
    • https://loyd.rs/images/file/65688972946.pdfIn PDF document text
    • 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_off0000d5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B3 16996 bytes
SHA-256: 298bfdad24f9daa7879174877a6fb377288a7a12bcc37e036aa7ae819fb521b3
font_01_sfnt_off000101e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FE 10544 bytes
SHA-256: b461e85281b64e090336ca9bb58a5371e87d91ad11be854e7651d031e3aa25b2

Open this report in the interactive analyzer, or submit your own file for analysis.