Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d2ddda160da045…

MALICIOUS

PDF

81.9 KB Created: 2021-09-16 03:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e762aa2983c31936d1571b62729f36fd SHA-1: bbcefe900321a1c145532c5c70c4d5ab364bab41 SHA-256: 96d2ddda160da045493483149ea94aa574a56bd2af505bc6dfb243028367b350
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to potentially disposable domains, suggests a link farm designed to redirect users to malicious sites. The 'utm_term' parameter in one URL indicates a potential phishing lure related to 'minecraft pvp hacks'. No scripts were extracted, but the overall structure and heuristic firings strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • 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://santehsevast.ru/userfiles/files/29808037822.pdf In PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/siradidazonawiv.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/33424607679.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/80407508179.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/wofudeninusopetenogof.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64300236748.pdfIn PDF document text
    • https://czus-lukasa.sk/userfiles/file/dexikutegifezuzefanuv.pdfIn PDF document text
    • http://qlionshousing.ca/userfiles/file/65489907224.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/74273485201.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/94536083167.pdfIn PDF document text
    • http://minerva-collection.net/files/files/30107342509.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/latalugibow.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/vikazibet.pdfIn PDF document text
    • https://altsovmun.ru/userfiles/file/polamukoxavexag.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/lonitojinabojatu.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/78998989218.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/82447343733.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69730098239.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/kajaxirexujojalon.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/78015761622.pdfIn PDF document text
    • http://ailizia.com/userfiles/gesezanejigavepopuzi.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/gasisugas.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/25691871072.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=minecraft+pvp+hacksPDF 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_off0000db8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8B 10564 bytes
SHA-256: 55e7634aac8ff1b2a9960fb933b45655dade9bd357fd5b9bfd8c70f3a1e3547e
font_01_sfnt_off0000f3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB4 18004 bytes
SHA-256: edb47751d7237b63ee275760c0318d4505572e9244e7fb89c1c7ad7ffa2bef26