Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2c7e40127f5561…

MALICIOUS

PDF

92.5 KB Created: 2021-02-20 18:48:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 85306c0ba4d9f7444ec19cdc98dc6262 SHA-1: c830fc3f607b247d9f420c125025fe6dbb951ce8 SHA-256: ca2c7e40127f55616950cb70ad58fcdeda69dbf4cfa1a07dae56c5d0a5baed18
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous links, including one to a disposable host, suggests an attempt to direct users to potentially harmful websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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 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.
  • 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://yafferge.ru/wix?keyword=harrison+mt+to+bozeman+mt In PDF document text
    • http://sellforce.ru/printable_cute_kitten_coloring_sheetsf9hrd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_5fd645e9bed7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377410/normal_5ffa985071b90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482208/normal_5fdba760e41fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419644/normal_5fecb635f37bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385228/normal_5fcf46a532651.pdfIn PDF document text
    • http://jixaravaxagisuf.22web.org/28353369085.pdfIn PDF document text
    • http://hotelhouze.ru/voodoops2controller._kext_mojaveflbyh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lazefip.epizy.com/ranavimubexazojalijolasor.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/22855185158.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/29197712497.pdfIn PDF document text
    • http://rawozenagi.epizy.com/bayes_information_criterion_bic.pdfIn PDF document text
    • http://seladetitogar.epizy.com/tor_browser_android_safe.pdfIn PDF document text
    • http://jowanesivokadeb.rf.gd/navy_fraud_waste_and_abuse_reporting.pdfIn PDF document text
    • http://wakoxoxotof.epizy.com/alchemia_story_jp_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/consumer_reports_top_reliable_cars.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/jipasobikoluw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADF 4740 bytes
SHA-256: 622cae87732c3dc9d3f2d177afb595d5e8f03fed129973ac1c9ca9feedba67bf
font_01_sfnt_off00012ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD2 14056 bytes
SHA-256: 1f47cc553dcf228f512625382c2261e16359bcf276729bed7d2ee99b8f4fa90f
font_02_sfnt_off000156d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156D1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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