Malicious PDF — malware analysis report

Static analysis result for SHA-256 89759e92b7955d2c…

MALICIOUS

PDF

77.8 KB Created: 2021-03-03 00:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2a3933b121120223b6b4fcd1301d9293 SHA-1: 68b9ce7264183dd4cff557aa0466c88b2d7269ae SHA-256: 89759e92b7955d2ce11b77d412b69a86593054f061012b9d1025e1c916710eb6
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards an attempt to exploit user curiosity via search-like queries.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://nipisod.ru/award?keyword=how+fast+does+a+150cc+scooter+go PDF link annotation
    • https://cdn.sqhk.co/towevefizub/grieSig/76241513862.pdfIn PDF document text
    • https://zixojubagever.weebly.com/uploads/1/3/4/6/134613499/c93c9.pdfIn PDF document text
    • https://cdn.sqhk.co/buweworipoza/hdgiAgd/word_crush_level_766.pdfIn PDF document text
    • https://nimuneroz.weebly.com/uploads/1/3/1/4/131407882/31aac8f3.pdfIn PDF document text
    • http://tehnotop.site/how_much_weight_can_a_plastic_bag_holdzehp1.pdfIn PDF document text
    • http://vinograd.io/zejolexoxanitor7e7wg.pdfIn PDF document text
    • https://karoxenerom.weebly.com/uploads/1/3/0/7/130739074/3140677.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/jFjgjjF/foguta.pdfIn PDF document text
    • http://belkwigs.com/research_methods_in_psychology_2nd_edudbeq.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/jgfd3Ko/92597607505.pdfIn PDF document text
    • http://zubiki.top/23641048640jwzcx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410679/normal_5fc8c4392a11a.pdfIn PDF document text
    • https://cdn.sqhk.co/bukevexej/XiaBVie/17922853091.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/falejogajir/arabic_alphabet_sounds.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/fupaputuvorufabifowajo.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/31168663350.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_off0000f3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EA 5528 bytes
SHA-256: 9a6afa4c223b1c2c252a9ec439a73a449b5b060461a09acd84ff1bf4d67ef30d
font_01_sfnt_off000106e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E1 10240 bytes
SHA-256: 3d70ce55f4b8b28b933bde0a9faae1dc2f8ebc6285b4e877140c2a4b0122370a

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