Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a76d5c5cafdc7e1…

MALICIOUS

PDF

65.7 KB Created: 2021-02-24 14:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ab0591c172f62294c8845a03000f7eb2 SHA-1: 3d187f435090674f613f594a709658558029bb96 SHA-256: 6a76d5c5cafdc7e1782b9845d5c851604bc3ea004c4df1b8d25b27921544ee9b
216 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/award?keyword=how+to+reset+lowrance+hds+gen+2 PDF link annotation
    • https://cdn.sqhk.co/rufadexu/gnygeaf/pottery_barn_coupon_october_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_600c818c25d4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460228/normal_5fd78b0d24a8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_602f93f87b872.pdfIn PDF document text
    • https://cdn.sqhk.co/kavatupopum/jagghji/25505851159.pdfIn PDF document text
    • https://wodaxudufusan.weebly.com/uploads/1/3/0/8/130814186/5271068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410002/normal_603198fed44a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417537/normal_602ca417d34fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_5fd0bdcb7cffd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_6017cfab37e35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416656/normal_6028345b3058f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450154/normal_5fd65819f0a4c.pdfIn PDF document text
    • https://tebifuwufarul.weebly.com/uploads/1/3/4/8/134886387/57dfcb002.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448744/normal_5fe102337907d.pdfIn PDF document text
    • https://cdn.sqhk.co/xamozafi/fjjgfXI/dagub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492281/normal_60098324ace72.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/hdhbEx8/netflix_login_help_page.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/zakunafu/36211371174.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/skype_7._32._104.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/gedegetujuzobaturubil.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_off0000c49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49B 5388 bytes
SHA-256: 12f5946f034708923fbc0c5e0aa6e49a5486da2ac1122c1e584b180d79ef7019
font_01_sfnt_off0000d6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F3 9944 bytes
SHA-256: da93cee815d16610175aeb5a8868c456840fb52d462583f5035826cb4cdbff8a