Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3daf3c011d0aaf…

MALICIOUS

PDF

84.3 KB Created: 2021-09-13 00:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 961ee0514c8de85b7d0f2350f71b5f8b SHA-1: 42c5f9079ecd774160ee3d584fd6fdb570ae9b80 SHA-256: 9f3daf3c011d0aafdb4e406aa087c6f8a17cee0e6965d7e603cf2d4a8ff98457
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crewmak.ru/uplcv?utm_term=hill+climb+racing+gold+hack PDF link annotation
    • http://dayou.tw/uploadpic/files/202109120024176499.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/zejiwowedivugurepagafolas.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/wofegimoj.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/50308864874.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16135cad889160---vizaranif.pdfIn PDF document text
    • https://airbays.com/userfiles/file/40533158720.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/92117751906.pdfIn PDF document text
    • http://rayer.cn/d/files/zebudazazigisiwugitorilul.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/7074308271.pdfIn PDF document text
    • http://dasbluemchen.com/90375274631.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/30326752179.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/nmhkmbu7u1457t18joatksg3cc/66712397996.pdfIn PDF document text
    • http://webs123.com/userfiles/file/71464286160.pdfIn PDF document text
    • https://mlspoland.co/files/file/sikoparisujerokezevel.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/gasozojigazudix.pdfIn PDF document text
    • http://inphuduong.vn/upload/files/1058769916.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210901_793022286B1705ED.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/posaloletirodede.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/60575457298.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/somaripediniku.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef08d3a76f---49847898680.pdfIn PDF document text
    • http://mextro.de/upload/files/likepa.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/gizuvi.pdfIn PDF document text
    • 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_off0000dd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD39 20768 bytes
SHA-256: b7fc23c4530f7a6ab0bd3d8696ec84f255a1410f9bc89e6dadcbd2d6aa055afd
font_01_sfnt_off00011429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11429 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C40 10644 bytes
SHA-256: 9918aebd1c0cca1486269aabb9a3ccca7705ec2bc0bbabf2c20f1ac31bce6a6e

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