Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b71a8e095063de3…

MALICIOUS

PDF

51.6 KB Created: 2020-10-27 08:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: ef112ce23d5712ef0e82a598823dfd54 SHA-1: 342204a621c408c226bebcb1fcbe1354a6d01a4d SHA-256: 7b71a8e095063de37682dee77a71aab40de94e6cdd9411dafab40eccb4ae6c95
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?keyword=dragon+ball+z+budokai+3+dragon+universe+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5f8f9bc8bd027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8b145f3d055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409623/normal_5f92e094e89b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f899bfbdb4dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_5f97225ba0e04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380681/normal_5f93ce327fb9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f87047c1f671.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008827.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008827.bin)
    • https://cdn.shopify.com/s/files/1/0268/6861/3308/files/jeep_grand_cherokee_1997_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4442/0246/files/22290334894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2630/3136/files/66432127817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2463/6823/files/zavesadujoromebevedep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8887/0059/files/combinar_documentos_en_uno_solo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/slate_digital_vrs8_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5104/7329/files/vobovibuxegexazosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3826/8318/files/62465096784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/6998/9573/files/vepujezukofel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3513/9482/files/89197478017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2263/1067/files/garmin_forerunner_205_software.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/ayia_napa_map.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/10th_class_mathematics_book_andhra_pradesh.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/bitter_kola_health_benefits.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/18215589197.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/namenawam.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 extracted file (font_00_sfnt_off00008827.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8827 5468 bytes
SHA-256: 349191e816502c0c62e906efd03ba9c4318d6e63b1bbdb0f733c5bbca1887b4a
font_01_sfnt_off00009adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADB 10952 bytes
SHA-256: 8a0a1a84e030a3f5dededcc5e18563a196ac2c856421ac6f94ed0e39426e8d48