Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f8e2137877f70c…

MALICIOUS

PDF

69.5 KB Created: 2021-09-27 07:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 294a71a10f30df191736dd3a0f6f765d SHA-1: 6ce92b98fd0469515895150aab71a08d0e630c38 SHA-256: d1f8e2137877f70cd2e95fe49092715305974d0570c3b519239bf731361cb6ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content are consistent with attempts to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://hung168.tw/UserFiles/files/34419275436.pdf In PDF document text
    • http://madonnina.info/userfiles/files/lunobobavizirap.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/wixekiredobigisajer.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/kakitavimalinipofera.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/6713136515.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/82791971374.pdfIn PDF document text
    • http://erictex.com/ufiles/files/tanimubopepaguzal.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/eed27d3df2c1e7ff9463f3029146dd1a/81231743246.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/debagifumafolisunona.pdfIn PDF document text
    • http://musorcentrum.around.hu/files/article/file/gazugasokabunoxawur.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/72587839976.pdfIn PDF document text
    • https://5udua.com/contents/files/lokapewibojudu.pdfIn PDF document text
    • https://onsale.social-push.cc/data/fckeditor/files/solomokofomiva.pdfIn PDF document text
    • http://runhouchem.com/upload/files/94312172462.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/99246873049.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/sojexifiraxibajat.pdfIn PDF document text
    • http://rongqichem.com/upload/files/27825567683.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/wiver.pdfIn PDF document text
    • https://fasleh.net/Files/files/54457284822.pdfIn PDF document text
    • http://placidlakes.com/larpm/uploads/file/nukebetowulezixafaxas.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/nopozawixi.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/18712971698.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/97277534505.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/jirugosanipaxus.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/9907727639.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=vidmate+app+download+video+hdPDF 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_off0000af89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A0 10512 bytes
SHA-256: 438258906ffca5afe6718e815bcaec7a9edcb03f41196d742f1b881c0c463560
font_02_sfnt_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 15876 bytes
SHA-256: dd99f25668723005e771137d463d5ef58a910e640fbe5cdf2a7560d2a267f1b6