Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee34aeb0575c759…

MALICIOUS

PDF

81.8 KB Created: 2021-09-08 22:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 823a616cb0f54d7efcea5041aef0937a SHA-1: 44e68beefa17fe48fcc7f77573dc68bc2287087a SHA-256: 7ee34aeb0575c7593d55b7adfe7f2efbe6d9f694f64d8ff4d32890a118c044fa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to distribute malware or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure, likely using embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ifap.it/images/file/foxowejetixu.pdf In PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/voxuvitesuxowekosepulomev.pdfIn PDF document text
    • https://olterus.info/contents/files/69476684666.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/161332248eb33a---60729865555.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/bosukobofoj.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613301f60d2f4---gevariseroxedemenikomuwa.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/rapefifanudatutamolafurok.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/mamokevujo.pdfIn PDF document text
    • http://wajl.net/img/file/202198225448.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210903_E095F63701CA5FC7.pdfIn PDF document text
    • http://klccpa.com/userfiles/file/goxijoliliva.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/fe70722da8df973f5dce142c5c69d5a0/jefisifununelapem.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/31109450070.pdfIn PDF document text
    • https://s-serviss.lv/userfiles/file/86150107757.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/saregejotanekufulejopun.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/keragajojebinatobasovu.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/56241699737.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109040359502762.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/82102851298.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1501l47i26kvc0vk73e2h8h9r6/43711763024.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/65256991471.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109010549358110.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/64410951022.pdfIn PDF document text
    • https://majubesar.info/contents/files/luvevekuwanederasalebo.pdfIn PDF document text
    • https://ms2oke.com/contents/files/27673598303.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=my+hero+academia+season+3+episode+1+english+subPDF 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_off0000d43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43C 11436 bytes
SHA-256: 77edabb067a4ef0403ef5c7e6da33c39f9eaf4f86af9ac26f295043db7ec6a90
font_01_sfnt_off0000eeb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB0 19228 bytes
SHA-256: 735229288bf182c27951bbe5729d17ecfce9ee14ba29faa4dbc7dd32415519ae
font_02_sfnt_off000120e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1