Malicious PDF — malware analysis report

Static analysis result for SHA-256 b762a67de574061d…

MALICIOUS

PDF

74.7 KB Created: 2021-03-25 05:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7ab75e13a83ecd7af6df6b3d0e1510a6 SHA-1: f823c4f3c0943d0208ecf30fcefe75315993b7e5 SHA-256: b762a67de574061dcfd83762fc5238cc2df9b258aa38778695caff889c6688d8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/aws?utm_term=how+to+do+currency+exchange+in+india PDF link annotation
    • http://ragazadagiba.22web.org/pevip.pdfIn PDF document text
    • https://vedexojofidas.weebly.com/uploads/1/3/4/5/134581268/vedaxapulu_pakuku_telujom.pdfIn PDF document text
    • https://lexabefi.weebly.com/uploads/1/3/1/3/131384613/1a95ffdaa.pdfIn PDF document text
    • http://pevojatinolotej.22web.org/futesugofomaxigi.pdfIn PDF document text
    • https://vobiromab.weebly.com/uploads/1/3/4/6/134653190/1239331.pdfIn PDF document text
    • http://bataxabinon.22web.org/apple_inc_company_profile.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/moragabifaxowi.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/sazurekedana.pdfIn PDF document text
    • http://kirerela.iblogger.org/foundations_of_python_network_programming.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c0c3310-c646-4646-8eeb-f490c67838e9/guvafufig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd1a3c9-bc02-4aab-8d7e-94254255ce27/51395463202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5775ac29-8d15-41e0-90ff-0387ae844a1d/39993077654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a36ad6f-1b37-4f2a-8bd0-d819086864cc/2006_yamaha_kodiak_400_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e966478c-1ff0-4892-866e-a8faff7115bc/40331822661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/536ef01a-fa3d-4e26-ba53-bdb3c8664d38/xawobetiseg.pdfIn PDF document text
    • http://famekemij.epizy.com/mutedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ff31bd-05fc-4cbb-b7e1-6acd2b6b7e60/public_international_law_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9b108f-90fe-4d58-a5c9-48f29287b37d/48571390766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9578950d-7812-4bbd-8489-5138336687a5/diary_of_a_wimpy_kid_long_haul_full_movie_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/589753ba-1db8-4a0d-b042-0a6ced2e512a/selection.find.clearformatting_word_vba.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE823 5212 bytes
SHA-256: 6244ac779499832f6b2a33f7fa556602b554c57b6c29d303bc33cf766c18c3be
font_01_sfnt_off0000f9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F2 10380 bytes
SHA-256: 7b13be6d6860d2eb9844f5e5d3f0e05d48515174a224677dda0815bf71b2d74a