Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2ff0e1bee49725…

MALICIOUS

PDF

79.9 KB Created: 2021-02-28 15:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b47785bbbce4a1918beccc7588408e7b SHA-1: 192e55e6d5214bfe1d01a7cde24efff38732c8ce SHA-256: 0a2ff0e1bee497259c5cbca7d9b8d982bf784a4a6b97b4a0081fb5023219eb54
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites, including a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to distribute further malware. The document body, though heavily obfuscated, contains text related to car prices, suggesting a lure to entice users to click on the malicious links.

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/award?keyword=toyota+camry+hybrid+price+in+qatar In PDF document text
    • https://wilegefozuf.weebly.com/uploads/1/3/4/3/134399327/7330333.pdfIn PDF document text
    • https://valojeruxul.weebly.com/uploads/1/3/4/6/134681631/116c3b71.pdfIn PDF document text
    • https://weraxugunelega.weebly.com/uploads/1/3/4/7/134719696/lixomipada.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/2015_jeep_cherokee_latitude_parts_diagram.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/nimabiwijiwod.pdfIn PDF document text
    • https://goxapixexaze.weebly.com/uploads/1/3/1/6/131607486/d99011e4597.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/how_to_calculate_vif_in_r.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/gighjjh/goal_line_blitz_forum.pdfIn PDF document text
    • https://xekigumi.weebly.com/uploads/1/3/0/7/130776031/504dd.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/dukexajuj/sejoduworoxikef.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/30017573430.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/78534036318.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/nubugenowizawiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/barcode_label_software.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/38907096253.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/adobe_writer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/pokajidemidepatokokikup.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/missing_words_in_a_sentence_worksheet.pdfIn PDF document text
    • http://koxolavomuzo.myartsonline.com/is_it_ok_to_change_transmission_fluid.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_off0000fb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB71 5420 bytes
SHA-256: 0bede1a64b889345e79642226adab85b97f333f1c48c8102b3ac2584e44aca44
font_01_sfnt_off00010db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB1 10676 bytes
SHA-256: 8c28ce44cfa2c635ea8f9d9d7dacb58eca4f998425e54baef9210e76220df96b

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