Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d725d6b86c140ca…

MALICIOUS

PDF

80.3 KB Created: 2021-09-17 19:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fa9679f49adde0a17de0a58464793955 SHA-1: ddace1bd33dfa82fb8089eb97249c9f03dfa5209 SHA-256: 0d725d6b86c140cab06bab494fa4b878a4dbf73c4c9b92b32d86fb4e76edb1f7
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The primary purpose appears to be directing users to a network of sites that host more PDF files, likely for SEO poisoning or to serve as a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://mycoapaisyl.com/webimages/files/91002027835.pdf
    • http://artechq8.com/beta/uploads/files/womim.pdf
    • http://195exim.com/datas/files/vopelituguwalarenupez.pdf
    • http://urdu-hadith.com/survey/userfiles/files/38841039553.pdf
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/wasafizitokizapupukovop.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/84081599546.pdf
    • https://profitaler.com/UserFiles/file/32281271897.pdf
    • http://world-green-hope.com/uploads/files/58813091837.pdf
    • http://clairvoyantinfotech.com/demo/images/rurebodagikewodibag.pdf
    • https://basundharamart.com/userfiles/file/87691708235.pdf
    • http://yotlist.com/uniformkontakt/userfiles/image/files/boxevi.pdf
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/gujibubap.pdf
    • https://hantverksakuten.se/ckfinder/userfiles/files/91213639374.pdf
    • https://ctners.com/ckfinder/userfiles/files/rivuxarewebutirut.pdf
    • https://cplastik.cz/data/cms/file/21147186973.pdf
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/83999141525.pdf
    • https://preprodpcb.com/userfiles/files/51762147592.pdf
    • https://xn--fiqa735be48e.com/upload/files/nonugebasafimoges.pdf
    • http://jurabos.nl/include/editor/file/mozal.pdf
    • https://sharks-cz.cz/images/file/51221870573.pdf
    • http://audidalys.lt/ckfinder/userfiles/files/82918524379.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=dishonored+dunwall+sewer+safe
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d530.bin
99abab0c6b2a7b54c6935508dad5de0f696f7784570c1a358db8f2d99da52e4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD530 10540 bytes
font_01_sfnt_off0000ed26.bin
e27c820619f9139278142bec8f9c61767bac4bb637c3c3747d66c9325c044faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED26 18020 bytes
font_02_sfnt_off00011b52.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B52 16792 bytes

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