Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b33aeafccbb187…

MALICIOUS

PDF

39.9 KB Created: 2020-10-21 23:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 49b3dd3bc9fe4331eaaa7ef5712a10c1 SHA-1: fa1369f6b37f26eb2ddc92e08bbca33c9a278e14 SHA-256: 90b33aeafccbb187d23bddd638b158ccd2e77e36bb5045ffbef3f9dfb1a40eae
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://ggtraff.ru/aws?keyword=understanding+business+12th+edition+pdf+free+download In PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/fibawubaxavuvabu.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/9970068.pdfIn PDF document text
    • https://vedabigejiko.weebly.com/uploads/1/3/1/4/131438046/4654033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f8724956f270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f86f4371c5ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5f87ea49259e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393022/normal_5f8e4ef3bd7de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_5f89f74e18157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f8d9e5d990ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_5f9086fa8df99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379355/normal_5f8bff55b8eef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f88238fd9098.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_5f8ef93888c47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f885fe965b7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f89152bca393.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2993/6282/files/xenoblade_zenobia_affinity_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2983/7982/files/nipatelulefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/joliderif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9948/0998/files/torsion_testicular_pediatria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8840/2839/files/62958160598.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/inter_1st_year_english_book.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/pdf_b._sc._physics_syllabus_of_ignou.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/mumbai_road_map.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/acuerdos_de_san_andres_ezln.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_off00005a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A96 5708 bytes
SHA-256: 395c77f3f8d1c0010dd1a77a0b206671d881828f702a5ac1aa308360d861b868
font_01_sfnt_off00006e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E10 10620 bytes
SHA-256: b97ce903dd9df600ccb94f6b2b414604468c439e03c139c29e0b2b280adb3860