Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed55e129b36987a…

MALICIOUS

PDF

80.9 KB Created: 2021-09-17 18:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 483809fa9bc4649953c91ff0574d55b5 SHA-1: 417b8e4f29b4ecd8eea4427131b560f41eb38ae1 SHA-256: 5ed55e129b36987a7db539c552cf3cd839965321f0b3f5a1284c63d7ede0b8f0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high density of external links, many pointing to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=how+to+get+free+robux+online PDF link annotation
    • https://gangnampools.com/contents/files/77748866914.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/62329968340.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/bagolod.pdfIn PDF document text
    • https://vietnamwelder.vn/uploads/news_file/takerobelupodugune.pdfIn PDF document text
    • https://windsbs.biz/files/file/38114718600.pdfIn PDF document text
    • http://agilesolutions.in/uploads/40804126875.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/94228223287.pdfIn PDF document text
    • http://friend5190.xyz/js/ckfinder/userfiles/files/4431174292.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/wovevaxedutigifap.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/nuvufifukufaforifo.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142ea82707fc---69342778184.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/sumomulebukonewemalem.pdfIn PDF document text
    • http://jowinbio.com/upload/files/202109071304349594.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/vifonozepaxadid.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/46546092730.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/detevutululenewowixoki.pdfIn PDF document text
    • https://adrfarysz.pl/userfiles/file/nasuza.pdfIn PDF document text
    • http://iviltra.lt/images/files/10586185161.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/49190275506.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/livurefawenujuvom.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613499681ea80---53065811620.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/82100735428.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/87429239038.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_off0000dac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DA 10480 bytes
SHA-256: ff1a2eb9f129df20d803c7e576ac4cbdc7163f390e3cb6e94590fd21a2203bed
font_02_sfnt_off00010aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACA 16808 bytes
SHA-256: 489c109b2eedc374de222962bc1ab90ab092a039ebf35fa40026806c9f4ce331

Open this report in the interactive analyzer, or submit your own file for analysis.