Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5c007f9512d7eb…

MALICIOUS

PDF

75.1 KB Created: 2021-02-27 01:45:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 22f7377e5312a7b44fefcd9fde145c6c SHA-1: 0643aec82d615a6d2f7bd9234293d44760ddaf08 SHA-256: 0c5c007f9512d7eb3ed0f26556daacb19e4a8c1017081439de43cf228aad3ab0
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=percy+jackson+and+the+lightning+thief+disney+plus PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379837/normal_601e02c16d699.pdfIn PDF document text
    • https://xazefobilizap.weebly.com/uploads/1/3/1/3/131384081/xipunes.pdfIn PDF document text
    • http://ecoservice-vlad.ru/contemporary_criminal_law_concepts_cases_and_controversiesz77qv.pdfIn PDF document text
    • https://fogepiwutakeru.weebly.com/uploads/1/3/2/3/132302718/dotumu.pdfIn PDF document text
    • https://dojosijodutater.weebly.com/uploads/1/3/6/0/136050104/5007472.pdfIn PDF document text
    • https://jekowidemovo.weebly.com/uploads/1/3/4/7/134702183/7658381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443801/normal_60161cab4f35a.pdfIn PDF document text
    • https://fabimevedojepa.weebly.com/uploads/1/3/4/6/134678150/gudaxugobet_vexubi_mepuza.pdfIn PDF document text
    • https://gutazalofekeva.weebly.com/uploads/1/3/5/3/135395177/2daed5f17039.pdfIn PDF document text
    • http://ukranews.icu/how_to_turn_off_razer_keyboard_lights_without_synapse06ru0.pdfIn PDF document text
    • https://mopawikivitofa.weebly.com/uploads/1/3/4/3/134347346/maxorivogobug-bejufog-kofix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367643/normal_5fef824316cfc.pdfIn PDF document text
    • https://jatilupek.weebly.com/uploads/1/3/4/4/134491857/midabaxewilenanok.pdfIn PDF document text
    • http://tiktoktop.design/filo_pastry_sheets_aldig2it6.pdfIn PDF document text
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/110292.pdfIn PDF document text
    • https://lunokebu.weebly.com/uploads/1/3/4/6/134648327/1477516.pdfIn PDF document text
    • https://wavupuzubeje.weebly.com/uploads/1/3/4/2/134235525/zoxagi-saturulavuxapok-papofujerubo-bilidiva.pdfIn PDF document text
    • https://cdn.sqhk.co/wovupeni/cDHwBm7/radio_italiana_di_notizie.pdfIn PDF document text
    • https://zibozofos.weebly.com/uploads/1/3/4/8/134896422/ecdf1a98dd33.pdfIn PDF document text
    • https://jupikojeba.weebly.com/uploads/1/3/0/9/130968920/rugiv.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/ehgYsjb/nutikexax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BC 5660 bytes
SHA-256: 8ebbb2882045562d48311a233d8589e55318552d81739db6089efb830ff4f46d
font_01_sfnt_off0000f916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF916 11128 bytes
SHA-256: 2df7e06abca9fa3cbe4e10445655fb54f3ff9c92be95e034119e032fc201732f