Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2a0ed14b37f576…

MALICIOUS

PDF

68.8 KB Created: 2021-02-11 10:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 528d5760b459da64506b7d64fae9641f SHA-1: da882521d5256234dc7ba74ac7f4659071696cf9 SHA-256: 7c2a0ed14b37f576ea77ea666825d205829ea8c0aeaca1b74f8133cc7bfff53d
236 Risk Score

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.
  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://maypoin.ru/aws?utm_term=tamil+dubbed+thriller+movies+hd PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446497/normal_60006a9f88280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406168/normal_5fd7d2b3d6177.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/iZhi6id/helps_textbook_class_7_science_solutions_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368954/normal_5fe54d58bb516.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420037/normal_600262ea4465a.pdfIn PDF document text
    • https://cdn.sqhk.co/fezemepusap/9jgicmD/78944987756.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/ZidMjgh/biwamufuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460263/normal_6003514de0547.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/rojarimeg/hQ4hgha/beach_buggy_racing_2_cheat_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_601b533338fb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469863/normal_6001e1a40d4bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5fd61a41bef21.pdfIn PDF document text
    • https://xabetibupu.weebly.com/uploads/1/3/0/7/130738966/giduvuxeka_nexadil_dudolokovikos_gotudonuxo.pdfIn PDF document text
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/b969d.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/ZidMjgh/In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://filamejukak.epizy.com/rizejonasapowerotof.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_off0000d1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EA 5212 bytes
SHA-256: 7a83957f1339817561a34c9593b891a4759407c44c5b4b80cf98a693b5bf19ec
font_01_sfnt_off0000e376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE376 10364 bytes
SHA-256: 289629b44686a02da96b0879c31490f911aa9cb6d83dbb62944cf41f7af1a56a