Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d44eb5eec5eb63f…

MALICIOUS

PDF

82.8 KB Created: 2021-09-17 20:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5d6ce0da5556b7b723e40eb9c551c80f SHA-1: 5989a9c7194fc70f3a703a9e043ba29f3d8dd5b3 SHA-256: 6d44eb5eec5eb63fab744abe1b2625e7d93dc989ad4f2cf4299ac4d630ac499a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The 'SE_CALLBACK_LURE' heuristic indicates the document may be attempting to trick users into calling a fraudulent number, consistent with phishing or tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://irlanc.ru/uplcv?utm_term=hogwarts+mystery+mod+apk+unlimited+books PDF link annotation
    • http://otoozevran.com/resimler/files/26552251603.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16144137620dd3---95501407642.pdfIn PDF document text
    • http://canshu.dlzj.net/upload/files/20210908132743657080.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-4/20210904173551161397.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/14076144002.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/18405756780.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/sirapebijatovudabanud.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202109131044158192.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/69864119767.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/27234600023.pdfIn PDF document text
    • http://zehanbiopharma.com/upload/files/kuwumavodej.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/datowa.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/ruxosuxunexeniriparokofi.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/72027825735.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/a7f823c7db5354d546f3b8c5b9fc0323/97785149777.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/32767338203.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/rezuzubedefowejego.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210910_280034B58D282418.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/5197250765.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/8978087454.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f27d032796---42274544591.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/88453351894.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/23779244631.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/14390134926.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/29852636057.pdfIn PDF document text
    • https://papiratisk.cz/soubory/62512503534.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_off0000da80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF292 18560 bytes
SHA-256: 24f189c41982cfcb3012a865bbef58e75ee004c3f2b4dd65f820bbf457d8d1eb
font_02_sfnt_off000122d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D7 11256 bytes
SHA-256: fcbc3e7613bf4a991bd2689af4228e471ede3c598a5d0d901ce53fdfd0f2e4e1

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