Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7acbb07ee2c3f8…

MALICIOUS

PDF

69.5 KB Created: 2021-02-21 20:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 85cd5a6707f790f70d111d566fe14883 SHA-1: 2f1e41be794c79bd3a237710b30c014a913a27e7 SHA-256: cc7acbb07ee2c3f8498862815ce609cf82fa0cb0f8096f56dd1bdc6e978b54dd
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=how+to+sharpen+stihl+ms170+chainsaw PDF link annotation
    • https://dobetabuzaduguz.weebly.com/uploads/1/3/5/3/135312815/afee40a.pdfIn PDF document text
    • http://safetymirrors.xyz/susib4jk3w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_5fd677d9bf076.pdfIn PDF document text
    • https://cdn.sqhk.co/manowipete/iiWt6if/96474023627.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/jFCidEW/lagodes.pdfIn PDF document text
    • http://mynasert.online/rarimoxuxipomtk2pi.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/Wjfifje/14678229967.pdfIn PDF document text
    • https://cdn.sqhk.co/forokuxodel/P3I36hd/racing_moto_mod_apk_download_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/podcast_soundcloud_en.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/bivekabenibakinuje.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/honda_cmx_1100_rebel_review.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/aditya_birla_mutual_fund_stp_form.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/saxupolemewisibowa.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/putekogo.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/vunep.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_off0000d21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21E 5500 bytes
SHA-256: d646ebede12b2120ff1a9913b06cb6082545aef93b144a05fca60d9a04ec28f3
font_01_sfnt_off0000e4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 10648 bytes
SHA-256: 52652f5cebb65b4fcc5fd6fef7ef849d4e90917a40308cb190555022c9a5c38f