Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2347cbcc5db10bd…

MALICIOUS

PDF

36.1 KB Created: 2020-11-05 16:01:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 4922e405b330e56ded331a52bc70807d SHA-1: e7a20cbc8366c84be2bc24a3bc92230417e9b496 SHA-256: d2347cbcc5db10bd2ba88d8a7a71cd34a4e81a436180307cde41627d952ce1ce
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?keyword=dr+degroot+ukiah In PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/xogitamidinidaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_5f96de9816b43.pdfIn PDF document text
    • https://bolefapazudakaj.weebly.com/uploads/1/3/4/4/134478960/3547514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413850/normal_5fa1fa51ec47b.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/donake/6739212321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4499ca8-f88d-4766-9e95-e2c7a589c268/zuzikurareforapoved.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/ganejokafinizasexibexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3474/5253/files/las_reglas_del_basquetbol_actuales.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/sony_icd-px333_digital_voice_recorder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d7548b-a550-42cc-8219-692881d75474/60828647430.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/nothing_is_true_everything_is_permitted_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/srimad_bhagavatam_in_telugu_iskcon.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_off00004eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EB7 4940 bytes
SHA-256: cd9df9d73d1851519fa5588c950b4915e23323534726e6d0c5c31b89233b7d64
font_01_sfnt_off00005f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F84 10828 bytes
SHA-256: e2409f7af84355c347fce4b45c13b30ff15bfe120c3e2ebcb61ce609f01770a8

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