Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cd726980b1d8459…

MALICIOUS

PDF

84.8 KB Created: 2021-06-07 09:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5005da4790b3606eb0240a21097bad26 SHA-1: ad23b72766bf1ea76e744956a5deb093a5000c8f SHA-256: 9cd726980b1d8459f8fd0d370e64721c66ebe652f5e5b079b0d61fa563911c2d
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to online movies, which is likely a lure to direct users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/pbw?utm_term=filme+online+subtitrate+in+limba+romana+de+craciun PDF link annotation
    • https://vezudoki.weebly.com/uploads/1/3/4/3/134320633/zejuzibo.pdfIn PDF document text
    • https://wopuwidutava.weebly.com/uploads/1/3/5/3/135322166/ruliwefadikudukadedu.pdfIn PDF document text
    • https://dojufewuwi.weebly.com/uploads/1/3/4/2/134235401/c39fd86d0a87b07.pdfIn PDF document text
    • https://xeromikivato.weebly.com/uploads/1/3/2/6/132695960/97e0f35952945bb.pdfIn PDF document text
    • https://tuxativavowaz.weebly.com/uploads/1/3/1/4/131437956/zapojugewosalif-vexexobumon-daramumoras.pdfIn PDF document text
    • https://lajonomopizu.weebly.com/uploads/1/3/0/7/130739457/fabazeb.pdfIn PDF document text
    • https://pizojiri.weebly.com/uploads/1/3/4/6/134651663/d7eb81bc6b.pdfIn PDF document text
    • https://sekulawovow.weebly.com/uploads/1/3/4/5/134578441/f3699f17ad93a55.pdfIn PDF document text
    • https://wokukowuvewa.weebly.com/uploads/1/3/4/3/134316041/f45cf8916.pdfIn PDF document text
    • https://rejowuboxobe.weebly.com/uploads/1/3/2/6/132680789/vovolodore-lapagupowe-rugexeligif.pdfIn PDF document text
    • https://padipemoton.weebly.com/uploads/1/3/0/7/130739419/kumilexukamu.pdfIn PDF document text
    • https://zazusixalug.weebly.com/uploads/1/3/4/4/134491239/bb60c3fcf31.pdfIn PDF document text
    • https://lupagizan.weebly.com/uploads/1/3/1/6/131637074/juxun_fovupusawurav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kalunagepigi.pbworks.com/w/file/fetch/144425433/hotel_housekeeping_checklist_form.pdfIn PDF document text
    • http://paderukut.pbworks.com/f/dovixafepedibexujatan.pdfIn PDF document text
    • http://betosaxugawi.pbworks.com/w/file/fetch/144665214/kutew.pdfIn PDF document text
    • http://pitevaj.pbworks.com/w/file/fetch/144423165/lutugekowuboxewagaz.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/30736289856.pdfIn PDF document text
    • http://tedadopite.pbworks.com/f/how_much_is_carpentry_school.pdfIn PDF document text
    • http://mukibilevejo.pbworks.com/w/file/fetch/144446826/mipevi.pdfIn PDF document text
    • http://pebegijopolo.pbworks.com/f/bivinelipukaxekimoz.pdfIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144475491/71025179951.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_off0001098d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098D 5180 bytes
SHA-256: 924a08a4d8f1745a706afe9af2da936ef7300a71a58fb65573c578ad183eef11
font_01_sfnt_off00011b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B11 13160 bytes
SHA-256: 76dd0598fc08347e09c3a090d7cead1c9cfd24e190b0981141c78d9ab9c866d5