Malicious PDF — malware analysis report

Static analysis result for SHA-256 867addf19a172658…

MALICIOUS

PDF

80.5 KB Created: 2021-09-22 12:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ae2c5be363a6f11ac4aaaca51184fdb2 SHA-1: 7e2e70a4a40ac58a4a5113839d05d6594b0fa8cd SHA-256: 867addf19a172658e6fa01c9b0c6eaaff0db82c9f154f77733e0451b62366cb8
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 external URLs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded content point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://irlanc.ru/uplcv?utm_term=hill+climb+racing+unlimited+money+apk PDF link annotation
    • http://phamtrangia.site/upload/files/funipukojezobisim.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/xosudoboxepozasewukixise.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/wogadamojopujadurope.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/nuwofolijasijiverejawidir.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/zikefasu.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210902102554.pdfIn PDF document text
    • http://bookblog.kr/data/file/files/480934408.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210921055011885.pdfIn PDF document text
    • https://yennenga.org/business_school/uploads/file/61476766263.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/84499054833.pdfIn PDF document text
    • https://asztromiskolc.hu/ckfinder/userfiles/files/84343854903.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/79705932317.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132870e632ef---49305724371.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/30683801224.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/xanereribuledakerumo.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/muwevifipad.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/161451f721ad73---tetenulebi.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/jirimafanodufi.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/22388719657.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/famomosotikoj.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/roxesebazen.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/168842769613310691e6c5.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_off0000d201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD201 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA13 18892 bytes
SHA-256: 80d44e507513666ce04fac49eeec1994b707f2e8c2e9dd66dd2141296e7c9028
font_02_sfnt_off00011af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF9 11128 bytes
SHA-256: c4f6f2f2bb58e1014545470cb525793421eeed9c82a2fd06767bbff71fb4ff8c

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