Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f22c977fa5d729e…

MALICIOUS

PDF

58.4 KB Created: 2020-11-05 17:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 5311587ce491fe593ba6e5af0f20d89c SHA-1: 1d3ac2cb8100d4d7b5c0db6a4d00cf2da6539e04 SHA-256: 9f22c977fa5d729e8a2fb3399221385e6aaecef9a19a2710464dfb5dd3351a55
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/123?keyword=scientific+notation+worksheets+kuta+software PDF link annotation
    • https://bosizeke.weebly.com/uploads/1/3/4/5/134596703/lugetax-lofefo-vibavesirawis-subopetoseme.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/xakubitopuxani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5f92f3a0d3618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5f90e67fd50f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_5f90c7e251c7c.pdfIn PDF document text
    • https://rineragafuvotut.weebly.com/uploads/1/3/4/4/134442037/xorirokogutilatani.pdfIn PDF document text
    • https://mejebogisoxofix.weebly.com/uploads/1/3/4/6/134606558/868dcf794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5f87cc859faf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5f8d0b7fd71ad.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/suxugipipolazog/mopizudisapexit.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/xorivafutowepaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/benevolent_fund_form_2018_download_kpk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9D 5196 bytes
SHA-256: ddda063e2226a1424804889cd9ea1a4c5fd6418c8edbc9ff8a1c6954810bbe9f
font_01_sfnt_off00009d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D5E 12144 bytes
SHA-256: 12924d8def8af062d111274dfad7be2fff9836f53a8606be0d12976e647e75a9
font_02_sfnt_off0000c702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC702 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c