Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a03aef08d0dfea1…

MALICIOUS

PDF

75.0 KB Created: 2021-02-16 01:53:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 1fd971d80a0ee275011b95d58aabfaaa SHA-1: fbf65c9f88d824ba2dd693f971179be99913997d SHA-256: 9a03aef08d0dfea1113fd86bdae728155ca827c763a0656a92cdefe412814151
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 at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. 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://yafferge.ru/123?utm_term=the+other+side+lyrics+the+greatest+showman+reimagined In PDF document text
    • https://cdn.sqhk.co/puwupasakej/djhiija/47096762710.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/gihijaG/67969418471.pdfIn PDF document text
    • https://kavirozix.weebly.com/uploads/1/3/3/9/133999962/310ebb4e5.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/hcjdzjb/vumuboriluzumiweranelore.pdfIn PDF document text
    • https://jifofavara.weebly.com/uploads/1/3/4/6/134631997/90896b5dd5.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/Tjfijjh/mobaj.pdfIn PDF document text
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/bojixafedesirox.pdfIn PDF document text
    • https://penabapemuzoji.weebly.com/uploads/1/3/1/4/131453208/piviv-veterigovi-samij-kavag.pdfIn PDF document text
    • http://kigujawogusufiz.22web.org/69772373316.pdfIn PDF document text
    • https://gitaxawisar.weebly.com/uploads/1/3/2/8/132814742/donakaxijizali-waralo.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/xaliwalufoguni/xobebaxiluwabowokibapa.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/newport_butane_lighter_gas_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/nobel_new_song_saregamapa.pdfIn PDF document text
    • http://karajifaderiwow.epizy.com/53516123691.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/intensive_care_unit_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/tuzojifikofumurinasu.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/fundamentals_of_engineering_drawing_luzadder.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/carcassonne_expansion_1_rules.pdfIn PDF document text
    • http://tikolikenugim.epizy.com/1338982839.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_off0000e9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B5 5496 bytes
SHA-256: 9132602c574483148b20f98740c51888763079a722adc314587a1a9a2170d56a
font_01_sfnt_off0000fc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC50 9868 bytes
SHA-256: 1ee6f7d5252f9039cdbeb39b240d9403c6bb3e2349b33b97c4a317bf8aaca0f8

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