Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3cae698901190d…

MALICIOUS

PDF

75.6 KB Created: 2021-03-04 13:04:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 14da36267c1e3b35dd763a59f67a72b4 SHA-1: 97ac291a9b53ba274b47cd651983d5416405ef12 SHA-256: 1b3cae698901190d49c517c38c358668fe3e3c58af60059b5e5327a1a0b91473
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a large number of external links, many of which are SEO-optimized and point to other PDFs. One of the primary external links is to 'ponafet.ru', which is suspicious. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and the nature of the links suggest an attempt to redirect users to a malicious site or a link farm.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ponafet.ru/aws?utm_term=ne+me+quitte+pas+lyrics+orion+sun PDF link annotation
    • http://healthit.space/mens_jumpsuit_fashion_novahcyi5.pdfIn PDF document text
    • http://fruct.space/giguretuwefibsrldr.pdfIn PDF document text
    • http://linawoninup.22web.org/41690762691.pdfIn PDF document text
    • https://xopomosafeg.weebly.com/uploads/1/3/4/7/134732974/8142340.pdfIn PDF document text
    • http://dompodklyuch.com/musgrave_public_financef2i8x.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/12625b61e3a3.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/gdhdENH/phoenix_wright_anime_episodes.pdfIn PDF document text
    • http://junelizirigoroj.iblogger.org/alpine_cda_9884_bluetooth_adapter.pdfIn PDF document text
    • https://cdn.sqhk.co/xewumoxu/hggdhcg/cobb_theater_lakeland_showtimes.pdfIn PDF document text
    • http://tradestaroffice.com/508907938923i3y2.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/uggghhj/700c_wheel_size_bike_computer.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/bipepezuwed/48039104776.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/como_hacer_un_con_fotos_en_el_celular.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/bengali_film_nabab_nandini_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/5594242239.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_off0000df02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF02 5276 bytes
SHA-256: 07ad0bda6899dc972e8a9050e3cf5da30b384f8868daa51f3bf4e826efb7cb83
font_01_sfnt_off0000f0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E5 2280 bytes
SHA-256: 74d4c5f2ba0b268266ee4fec05e42973c887f86c13404ecc52f6efe1169d1e05
font_02_sfnt_off0000fb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB70 10948 bytes
SHA-256: f9a6fdd3c1cfb7a9c057daad3ae64845eea83311ce7e1a4fddc3c8c38427a147

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