Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8dcfdc2dadb6f69…

MALICIOUS

PDF

67.5 KB Created: 2021-02-23 13:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b93a165c9adaa2d1e28337615b5a5b5c SHA-1: 17a6c50e192cb50b33cd1adb530d5e65cbe53b25 SHA-256: d8dcfdc2dadb6f69c01a3bc9489e195f2ce0941077cbd6fac1c99611903c18f0
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wix?keyword=online+c+ide+with+debugger In PDF document text
    • https://mewejubakokexal.weebly.com/uploads/1/3/2/6/132681976/1cff9d.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/dge84dT/70666946994.pdfIn PDF document text
    • http://jobs-ingenieur.best/kebakubixoowzwd.pdfIn PDF document text
    • https://cdn.sqhk.co/lazuxorus/ZMhgigg/64140890351.pdfIn PDF document text
    • http://proba7.xyz/cake_business_plan_in_nigeria3wx2g.pdfIn PDF document text
    • https://cdn.sqhk.co/katutilit/aMX1gha/bedekasekijiv.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/gjLHheQ/ice_cream_near_las_vegas_nv.pdfIn PDF document text
    • https://legaxebojidonet.weebly.com/uploads/1/3/0/7/130775342/batedisil-zizametosadomus.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/ae462.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/55121668549bur9e.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/gedexim/kemerejapaburoz.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/google_font_arvo.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/pilexede.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/saddleback_english_grammar_book_1.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/mobile_video_calling.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_off0000cbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF3 5072 bytes
SHA-256: bd97c1a7dc90fb82607a27e090138650f12ddf0c27c28096944352f3a9283ef1
font_01_sfnt_off0000dd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD42 10048 bytes
SHA-256: 99da8bf42d77420eadd83d0359e3594e8e36babe0cfbdc9ba41be9920954d9b7

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