Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96d2804d16c162c…

MALICIOUS

PDF

78.0 KB Created: 2021-04-01 08:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bbda20294f953277aeee68d446af6b8f SHA-1: c3f2a36e58bfa662cae887334bfb15c65cd9eed8 SHA-256: b96d2804d16c162c20294f088b44428e818a3330f3b32b1bc0ef62780c904bec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=intermatic+timer+ej351+problem PDF link annotation
    • https://cdn.sqhk.co/rapurakoke/2sGbSlS/96040893519.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotefi/jjfjhhd/snack._io_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/sobekalob/lhhicaD/juventus_vs_barcelona_2019_cuando_juega.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486537/normal_5ff54a8c35000.pdfIn PDF document text
    • https://cdn.sqhk.co/dulinifijal/XZmXhcI/agenda_21_local.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426547/normal_5ff21dc2cc6ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_60276d8ac570d.pdfIn PDF document text
    • http://jeruxawi.iblogger.org/old_world_of_darkness_dice_roller.pdfIn PDF document text
    • https://cdn.sqhk.co/bojodunaluko/KzjjRVF/lemevog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_60185497f37c5.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/02acd5d4-4778-478a-8a5c-cb8cacb8ce2a/48715423439.pdfIn PDF document text
    • http://kajonefev.rf.gd/early_childhood_education_journal.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/dr_jekyll_and_mr_hyde_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/mujem.pdfIn PDF document text
    • http://faxumev.epizy.com/50121269888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a22ea3c6-ddc2-44e6-9320-c5d011bcab0b/tukamamevifojefemububaju.pdfIn PDF document text
    • http://vogapodidojuguf.myartsonline.com/arduino_ide_information.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/69499621810.pdfIn PDF document text
    • http://bavizajo.epizy.com/home_budget_planner.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/20965308346.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/miya_bhai_new_song_dj.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_off0000f365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF365 5392 bytes
SHA-256: 6c92af1a76abdbef8db5c15ad0c091635c7dd075798d43c32d39e8aefdb67017
font_01_sfnt_off000105aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AA 10984 bytes
SHA-256: e5d1b128cf8b83b88455ef1f09607937d1fbc44e18c615359edd4b03c062864f

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