Malicious PDF — malware analysis report

Static analysis result for SHA-256 7924288ec29b206f…

MALICIOUS

PDF

85.9 KB Created: 2021-05-29 13:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e37c0bf11470f0316cfb5a35752bfc7c SHA-1: d7b3430f2b1c19a008e2426ec8b1cc7fcfaa21b9 SHA-256: 7924288ec29b206f8e9f8a1b0e8035ad9f73aaccfe542ea385004b02d129065f
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and an ML classifier, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The primary lure appears to be a fake download link for a game ROM, which is a common tactic to trick users into visiting malicious sites.

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://kuzutuzo.ru/strik?utm_term=how+much+to+feed+sun+conure PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410013/normal_5fcd273d32553.pdfIn PDF document text
    • https://wivaxuzavegisi.weebly.com/uploads/1/3/4/7/134769578/7444cfb85d.pdfIn PDF document text
    • https://tuzunogosur.weebly.com/uploads/1/3/0/8/130815213/rupob.pdfIn PDF document text
    • https://tumafikajenama.weebly.com/uploads/1/3/5/3/135326798/zizetonuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393022/normal_6027c3194d6f7.pdfIn PDF document text
    • https://wugisawenepo.weebly.com/uploads/1/3/4/7/134749509/7772648.pdfIn PDF document text
    • https://tozubovudifudi.weebly.com/uploads/1/3/5/9/135973827/9176732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484143/normal_606139bb2adba.pdfIn PDF document text
    • https://xerotopofuwega.weebly.com/uploads/1/3/1/4/131406930/ac953d73d.pdfIn PDF document text
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/da305ed75441.pdfIn PDF document text
    • https://mikazeral.weebly.com/uploads/1/3/2/3/132303371/4521406.pdfIn PDF document text
    • https://pojixaguwor.weebly.com/uploads/1/3/1/4/131453565/57ba2bde88fb6a.pdfIn PDF document text
    • https://semizafug.weebly.com/uploads/1/3/1/8/131871859/fdf9f113589.pdfIn PDF document text
    • https://pimupaxepa.weebly.com/uploads/1/3/1/8/131857198/gofibemezemewoninir.pdfIn PDF document text
    • https://fenuligor.weebly.com/uploads/1/3/2/6/132695430/2274407.pdfIn PDF document text
    • https://bevifosadorafot.weebly.com/uploads/1/3/1/8/131856546/9e45f6e3917645b.pdfIn PDF document text
    • https://xamelanaf.weebly.com/uploads/1/3/5/3/135331914/rukugukuzano.pdfIn PDF document text
    • https://xosotujusosevo.weebly.com/uploads/1/3/4/3/134377620/e750ca3f7adaa.pdfIn PDF document text
    • https://wovebisaji.weebly.com/uploads/1/3/4/6/134687394/zezixujonuf.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/6b60bfb8-564a-4953-b2ea-815412502a3f/pokemon_ash_gray_download_gba_romsmania.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06f76942-4cb3-4cbc-b446-97e310e04983/43689196125.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_off00011577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11577 5072 bytes
SHA-256: 89b39fd3db26022a51d88358d4da3e8f4adcbe3d71c2ee80ac863ae51935425b
font_01_sfnt_off000126a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A4 10404 bytes
SHA-256: 24f108b155fec106a08be91aab9c01bccd809cda43ea049040867b1dec7ff4fa