Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea9cd9516da2130…

MALICIOUS

PDF

78.0 KB Created: 2021-01-15 00:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1bbffc02d8254d79fc5467c5acb13d99 SHA-1: 66b446ec8ed6bc43da676266c681e88ae9b0e581 SHA-256: bea9cd9516da213091ef9e29ddb7a34396f255e25cd698a19769066367f43f32
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded URLs, many of which point to redirectors and potentially malicious content, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier also strongly flagged this file as malicious. The primary attack pattern appears to be a link farm designed to lure users to exploit kits or phishing pages.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=arms+around+you+official+video In PDF document text
    • https://cdn.sqhk.co/fulaxanew/5LTqvje/drive_by_exploit_bitcoin_email.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/omjehdb/45863648341.pdfIn PDF document text
    • https://site-1187779.mozfiles.com/files/1187779/gmail_inbox_sign_in_gmail.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/893689.pdfIn PDF document text
    • https://wesedujixezibo.weebly.com/uploads/1/3/1/6/131606467/9185180.pdfIn PDF document text
    • https://bufuduvo.weebly.com/uploads/1/3/0/8/130874305/lalegadiderediro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_5f9623be564e5.pdfIn PDF document text
    • https://pibigetikuke.weebly.com/uploads/1/3/5/3/135387636/wumibuwixiweduke.pdfIn PDF document text
    • https://maladebo.weebly.com/uploads/1/3/4/3/134305387/lotozipabirajoz-pusiwazox-rozujir-zidive.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/avery_5160_template_word_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/79358888216.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/skyline_ranch_santa_clarita_ca.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/caecilia_lt_std_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/bond_street_shoes_formal.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_off0000ec6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6B 5320 bytes
SHA-256: 9d13efa175684b6e7dda8be7df9e0fef0af2f2470e71a87bd8894dda1a858208
font_01_sfnt_off0000fe75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE75 14252 bytes
SHA-256: 35786f04c5363e42f21c04e61df0a4046d3da411d492abd6d895e3d75adb7ed3

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