Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec20600f71f2968…

MALICIOUS

PDF

90.0 KB Created: 2021-09-13 05:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e83d7fdfb6dbc7a4494da65f0f5be101 SHA-1: 068ac70da8fc994e504e111aa9a2fa5e846dddc9 SHA-256: 8ec20600f71f2968659007ce625c53c0c16c1ae7a78afc58a1e658828fbe09de
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. 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 analysis point to a malicious link aggregation pattern.

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://travelshops.pl/userfiles/file/nobemegosafewesef.pdf In PDF document text
    • http://pc-driver.ru/userfiles/files/12527011715.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/vivux.pdfIn PDF document text
    • https://sua.vn/uploads/userfiles/file/givogaxuwiwaxixes.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/bozove.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/497c6feb2f1d75a381427256f2f569bb/38244021690.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/tawivudasibiwadazexosete.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/polazukugunox.pdfIn PDF document text
    • https://kemxoithanhhang.vn/app/webroot/files/images/pages/files/97504309079.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/jelewuxivawabuj.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/pejojoxewekokewubawugupa.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ab7633050---melumugila.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/9728339918.pdfIn PDF document text
    • http://www.520amis.com/upload/files/sufefakarazenasuro.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/simudamawejitoreg.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613006b5cb047---51735140005.pdfIn PDF document text
    • https://webrobogo.hu/kepek/82835823649.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/xelamigisezovodivavura.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/76171968712.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/60416409470.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210903_192055.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/lumuzukufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=saeklesio+kalendari+2021PDF link annotation
    • https://www.posluh.hr/ckfinder/userfiles/files/gujokutube.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_off0000fcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB4 10604 bytes
SHA-256: f3f133fd822ccdd27b0668fe938775931f1e73c7c2fbdff2711204e667a7344e
font_01_sfnt_off00011509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11509 17496 bytes
SHA-256: 2c3b91290e6fd4d09aa6055d268cb844247dc256ae0f5c74aa83cb0fe76da297
font_02_sfnt_off00014283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14283 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1