Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6913b2749c7b31a…

MALICIOUS

PDF

74.5 KB Created: 2021-09-17 15:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 22a48805722296521e937896bb3ab7f9 SHA-1: 5b29cf84b623351c6ba9c68ff1b9b1467557b7b9 SHA-256: e6913b2749c7b31ab2de87ecc6a6788a3be43a2b94a128af5200eb71705f118a
146 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or scam attempt. The heuristic 'SE_CALLBACK_LURE' indicates the document likely prompts the user to call a phone number for a fake billing, refund, or security issue. Numerous external URLs were extracted, suggesting the document may lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://inwebjor.ru/uplcv?utm_term=where%27s+my+android+device+manager PDF link annotation
    • https://tennis-samara.ru/img/file/56960164331.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/pesotig.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/fuzafojuxoraribapusu.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161425101843ed---sidik.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/teduje.pdfIn PDF document text
    • https://ms01bet.com/contents/files/gufuw.pdfIn PDF document text
    • http://topaslt.com/userfiles/file/59770080966.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/dupalifir.pdfIn PDF document text
    • https://mimpishio2.com/contents/files/73192181514.pdfIn PDF document text
    • http://df-2.de/images/daten/file/25970976171.pdfIn PDF document text
    • https://amoslodge10-org.alljobsinliberia.com/ckfinder/userfiles/files/90402757849.pdfIn PDF document text
    • http://bacsionline.net/userfiles/file/nebudadidukagesizobezid.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/74343539507.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/kajuxataba.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/ziworijabinutifoni.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/kezuvupub.pdfIn PDF document text
    • http://ellev.fr/upload/files/jubedakotokizoronogigaluw.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/37836376831.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/65055050874.pdfIn PDF document text
    • https://bawauang.com/contents/files/33760266240.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/navupixerurular.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/74801329355.pdfIn PDF document text
    • https://sim2007.com/files/banobuxad.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133adaa0c439---felig.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_off0000c05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05F 10880 bytes
SHA-256: 1b157fb54f84e915e2ec131a02a2a873f2968b4a35fc836ffcc307ff2fd269ce
font_01_sfnt_off0000d936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD936 16812 bytes
SHA-256: 48a5c4fdd15dc94cc3de7a9ba46ebfd1a6e82bd64f7d5036466f3a2dbd30e816
font_02_sfnt_off00010420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10420 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1