Malicious PDF — malware analysis report

Static analysis result for SHA-256 88205c16e1c55950…

MALICIOUS

PDF

81.5 KB Created: 2021-09-24 05:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e92ef4eacf0decd8f120b3183e1b1335 SHA-1: 496d893d0e4813826b02b6c159817ca26b2c3557 SHA-256: 88205c16e1c5595017cde5da30f69b82d421fae65a3f1dc76db41f14ac1de442
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to unknown domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

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://sistemagestiondpr.com/userfiles/file/wupav.pdf In PDF document text
    • https://revive.fashion/upload/files/27430860509.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210921_658C2B02E11E359E.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/2242737070.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/kobagox.pdfIn PDF document text
    • http://shangyi-pump.com/uploads/file/071559048275.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/3861195319.pdfIn PDF document text
    • http://www.sctiec.com/up_files/FCK/file/fidonelemozavemaset.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca9eed62ff---40295005560.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/pojojudusijavulefok.pdfIn PDF document text
    • https://harteron.ee/userfiles/file/zasurikiwaxujugikiginifa.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/31719523498.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/66720659260.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/e9014aa6e53f8b883ef0e048a8a0421c/fivekaburapezenifumugofo.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/57024592539.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/29120948115.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/vanepifikisabegal.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/35934633181.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/52562233327.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/wabebumokutafofitavidu.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/wolilumanebivemoxekupe.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/nufosewif.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/mikuwewumujatimavag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=confessions+of+a+teenage+drama+queen+full+movie+online+freePDF 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_off0000da95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA95 17180 bytes
SHA-256: 8ae1d7a64253fead878904ccb97e08cbd576b7f20026fd4d40a554d3ee833299
font_01_sfnt_off00010671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10671 11040 bytes
SHA-256: 4da681a41cbb73c7243b40b7c63a77c4831fbe5c1926933107f8f34c7aa93c38
font_02_sfnt_off00011fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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