Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34ba9ba9ae56337…

MALICIOUS

PDF

77.0 KB Created: 2021-03-01 00:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 89ac8f7d0e36dc5a3d5ab8de7c1c08e1 SHA-1: 29adc6b593094eb9533b345f6973dada916c1c7a SHA-256: a34ba9ba9ae563370371011436b73e1e76e70b7453678f7fc4e8379c24781107
134 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains multiple embedded URLs, with a primary focus on 'https://lozipotod.ru/strik?utm_term=is+rainbow+six+quarantine+free', suggesting a lure to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious intent by identifying a link farm on disposable hosting.

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/strik?utm_term=is+rainbow+six+quarantine+free PDF link annotation
    • http://judezibadixisom.22web.org/35538601632.pdfIn PDF document text
    • https://judozolu.weebly.com/uploads/1/3/1/4/131407514/vetebefigi_nufonisuken_luxub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_6014b0f02dc56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450421/normal_5fc8750d3a30b.pdfIn PDF document text
    • http://vetodegaro.22web.org/34521789911.pdfIn PDF document text
    • http://bodugupuk.22web.org/46322901405.pdfIn PDF document text
    • https://nozudepoget.weebly.com/uploads/1/3/1/1/131163917/sopazedeken.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473651/normal_5fef48c6a15f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383807/normal_600b64c6708e6.pdfIn PDF document text
    • http://logunej.iblogger.org/net_speed_monitor_windows_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gulejarapexovut.epizy.com/amona_tete_mabo_by_ayewa.pdfIn PDF document text
    • http://luzirilokupozar.rf.gd/74486223896.pdfIn PDF document text
    • http://mobopufo.rf.gd/bahubali_movie_free_mp4.pdfIn PDF document text
    • http://sezeludijufoma.epizy.com/voice_recorder_app_apk.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_off0000f034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF034 5092 bytes
SHA-256: 62aeb422a8cd90e9041d43957d51040383c397d5faf3dd59c3f148a438bbf70a
font_01_sfnt_off000101b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B0 11144 bytes
SHA-256: 88814872058c906ed6e476d341fdd674d5908e79250193cbc30f493a559b5fcf