Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cacb2c1e8eec474…

MALICIOUS

PDF

78.2 KB Created: 2021-03-14 01:18:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7852fcd145d2c853a2816f07bb131b71 SHA-1: 8ec11b20f68810c488a3a8c1153a2c9920c5e155 SHA-256: 9cacb2c1e8eec4742259cf756369d848611a728eb82a4a49fe72f7a714d01608
194 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to a 'Nonprofit collaboration agreement template'. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/123?utm_term=nonprofit+collaboration+agreement+template PDF link annotation
    • https://xuwejemeluk.weebly.com/uploads/1/3/4/3/134314543/waruvezenubirij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5fee895c634d4.pdfIn PDF document text
    • https://zebonusifok.weebly.com/uploads/1/3/4/5/134509505/bowevo_suxagoluzemu_tajekin.pdfIn PDF document text
    • https://kufuzuve.weebly.com/uploads/1/3/4/5/134589172/0be6022748ed332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500200/normal_603b2dc95e4e0.pdfIn PDF document text
    • https://ritajixudigozik.weebly.com/uploads/1/3/5/3/135345652/wefowage-suxufiwusedenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480580/normal_600d373c1a0bd.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/1139197.pdfIn PDF document text
    • https://nibovipuduri.weebly.com/uploads/1/3/0/8/130814681/kodiwubuwoko.pdfIn PDF document text
    • https://jotovaxawunujej.weebly.com/uploads/1/3/1/8/131856347/fuguvuxape_vanarajogebej_nekoni.pdfIn PDF document text
    • https://tewazaxapij.weebly.com/uploads/1/3/4/8/134873756/selixuwi.pdfIn PDF document text
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/9588430.pdfIn PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/konadolorur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8abcadfa-38be-4af5-9eb2-2f67c50bd605/why_does_my_kenmore_washer_not_spin.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/84840460093.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/angry_bird_cartoon_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdcd59cd-4374-4a26-8b5c-ed3c5130247d/luwutafab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/893ac62e-286a-4d16-bdba-508e64af0bc4/korufokitofinuvigotewali.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_off0000f523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 5264 bytes
SHA-256: 7dced89e72102b59ca28be63157316e8dd3fdf5ed64c5117347bef15e7d47138
font_01_sfnt_off00010702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10702 10616 bytes
SHA-256: e1e6bc0feccc0d45a5c2a7c7be53f29d9711a44c7dd82a14316074801c956fb6