Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68bc4e1acb53302…

MALICIOUS

PDF

70.4 KB Created: 2021-03-13 20:12:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 24191c2011f96431e782cea263b263bf SHA-1: bb9f438863fd0f52286adc140f6235da120299ed SHA-256: f68bc4e1acb53302ea680e5d591542be1617964c9fb74a2da085ec474b5f7675
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/award?keyword=business+plan+for+farming+poultry+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410416/normal_5ffb2e48aadbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383467/normal_5fecf15a4cc01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468814/normal_5fc5b42c0ba4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475864/normal_6036ac76f4209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393521/normal_5ff6722caae5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480142/normal_600077ec09397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475212/normal_6012116649558.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426696/normal_5fcefb7d6768d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411220/normal_5fe2797b1dbd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366324/normal_5fec6764cda27.pdfIn PDF document text
    • https://famofupogatom.weebly.com/uploads/1/3/0/7/130739443/kaxunotasos-zevomamitezo-mokoninola-davujepora.pdfIn PDF document text
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/mudobun.pdfIn PDF document text
    • https://daxokubazab.weebly.com/uploads/1/3/1/4/131406800/8644858.pdfIn PDF document text
    • https://pebenari.weebly.com/uploads/1/3/4/5/134518206/raguvebewulasuveme.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_4f4ff923ec1e42d0b6199def6c840bde.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suxiweke/ef_asnotracking_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/zemefu.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/bipuguwuzidif.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/26472116482.pdfIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_d2ef704b63fe4ef98857f8ac021781db.pdf?index=trueIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_3994d064003e43d99860385be78f84de.pdf?index=trueIn PDF document text
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_ea792ae8817b4ac59b7dee54bcac609e.pdf?index=trueIn 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_off0000d49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49D 5512 bytes
SHA-256: 03f490167d0fce4cb453efda4b887d3c722bb94c261004a0ed548d663e142052
font_01_sfnt_off0000e751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE751 10964 bytes
SHA-256: 46c51859ff714c945919498807e623fdafbd866cde15491ffb4d5a267327bf45