Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd897f318235a868…

MALICIOUS

PDF

82.2 KB Created: 2021-09-13 14:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 53025dcf1e87901a0b26f52bf9994609 SHA-1: b7f43fd8cea06b2bdda7346198b8419b196c0818 SHA-256: fd897f318235a86850026e405104b0288b83a7a2ece47105bb78c8a94542287c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. The document contains numerous links, many of which are on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution attempt. One prominent URL explicitly mentions 'download idm with crack 64 bit', indicating a lure for potentially unwanted or malicious software. The heuristic 'SE_SECURITY_BYPASS' also suggests the document may instruct users to disable security software, further increasing the risk.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://crownprolaw.cn/userfiles/Proj_Name/files/87056343697.pdf In PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/8054062878.pdfIn PDF document text
    • http://villacappuccina.com/userfiles/files/41829320493.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/balujipug.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/zuvodivagafas.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/62790537056.pdfIn PDF document text
    • http://hansungid.com/userfiles/file/21643367528.pdfIn PDF document text
    • http://finara-v.com/file_media/file_image/file/98098780450.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5158b7953---zefadakedo.pdfIn PDF document text
    • http://lejonhund.com/upload/92950791946.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/bizewaxepu.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/gujerixugagamexusovetuver.pdfIn PDF document text
    • https://ferest.ro/imagini_ws/41119746186.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/zufoniriniwokatafunibomen.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/tamixoleriwulafidaguwe.pdfIn PDF document text
    • http://zhongyuemedia.com/filespath/files/20210905013408.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/kuzikuxedux.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/2919533671.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136249cb84b7---52311629656.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210910_095042.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=download+idm+with+crack+64+bitPDF 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_off0000d443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD443 20712 bytes
SHA-256: 8429e29ff3c49e21516292c618f4fc0c0c6c8d6c734041f6e45a254c7d64f1d6
font_01_sfnt_off00010a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12272 10900 bytes
SHA-256: 6eeae411b2bb6362db95f394327d0b1d2e5263859525f59d9071c5d056480bc8

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