Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc2c586c7e35511f…

MALICIOUS

PDF

74.3 KB Created: 2021-09-16 23:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e351f561d82a636bf9ec7a1cacc600a8 SHA-1: ae4e31ae7e6b2750f362284abe8d25c5dff64c09 SHA-256: dc2c586c7e35511f3f532659693a20fec820c8f20b077380fb3cafeb583a7615
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The primary attack pattern involves directing users to a network of potentially malicious PDF files hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/69771655081.pdf In PDF document text
    • http://dylogistics.com/userData/board/file/jekededajinawelevizefo.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/tudetijamebalajitugujuka.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/voxenumulexuzeze.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/37661465866.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32492216762.pdfIn PDF document text
    • http://www.keizerco.nl/userFiles/file/19859525852.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/61a409af9fb3357e7bf3bcebf503f0e4/4572053334.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/26431156216.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/13437605352.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/naxineduzofoxojanejolekil.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/23494389998.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/daxefuzotowojizulovizop.pdfIn PDF document text
    • http://ptktent.ru/userfiles/file/numulakan.pdfIn PDF document text
    • https://mimpishio1bet.net/contents/files/vedefemaketok.pdfIn PDF document text
    • http://reyazahmad.bscsaoner.in/ckfinder/userfiles/files/28698953703.pdfIn PDF document text
    • http://suurelepa.ee/data/file/54430877814.pdfIn PDF document text
    • https://kaptenhoki.com/contents/files/lipapon.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/50525981629.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/vikotisuwudetozototo.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/90511507906.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/87883991053.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210911134523.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/22094180888.pdfIn PDF document text
    • https://bdata.vn/upload/files/tarimo.pdfIn PDF document text
    • http://airfa.it/userfiles/file/ribipararomomojafi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=rang+punjab+de+full+moviePDF 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_off0000bfa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA8 10956 bytes
SHA-256: 099f16ba1943329d3c9e66d7d00ba09942edfec27437fef4b0e11a018d0819c4
font_01_sfnt_off0000d892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD892 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 16676 bytes
SHA-256: 095009abf56a237c9621ae0480c4c37ddc6a25fecc86c9f8b006aee8898b535f