Malicious PDF — malware analysis report

Static analysis result for SHA-256 4442dcc9ba9ec4d9…

MALICIOUS

PDF

83.1 KB Created: 2021-08-19 14:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 95c455d7200155269345fb8dfa698d0d SHA-1: 51f163e3454f28f7559dd32ebc16201286014de0 SHA-256: 4442dcc9ba9ec4d91225dc6db551dfb45bb78811f80318ad5a9715c81448d866
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious PDF files on various domains. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file. No scripts were extracted, but the primary attack pattern involves redirecting users to potentially malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://ayhancevik.com/images_upload/files/tanabilajo.pdf In PDF document text
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/19221602576.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/17713197783.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/latexapuzisojirudenudumo.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/butumig.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/wifevufonejixol.pdfIn PDF document text
    • http://zxsolar.com/d/files/niritimurelulumaver.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/saguvenaku.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770e9e342fd---22173935180.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/84925946410.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/javovisoxuwibumilopi.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2c88029c7---64379587236.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/zimutusapenokof.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/saligegodotuki.pdfIn PDF document text
    • http://askort.pl/Upload/file/wogisasipuvu.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210702051855.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/sokekomogiziwujeli.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/32727204081.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/78712494318.pdfIn PDF document text
    • http://pnalog.ru/images/file/babomimumifudu.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/71625280813.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+much+oil+does+a+2014+dodge+ram+1500+hemi+takePDF 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_off0000df38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 11488 bytes
SHA-256: 1419e175a08eecc77a857fc92e4d54144af5605d395928a201a61d500681cdf7
font_02_sfnt_off00011277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11277 16880 bytes
SHA-256: 92dec8324ebe62fd56c60ec7c047a12fd51bc1e9fdfff6c6cd4ce2a0ed143981

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