Malicious PDF — malware analysis report

Static analysis result for SHA-256 001b3bfc5e42c827…

MALICIOUS

PDF

39.5 KB Created: 2020-11-04 01:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: fbba9677493c7a795764bb7dc274520f SHA-1: f156dcf67cb7adc1f2e8798ca40b440b889a5f19 SHA-256: 001b3bfc5e42c82795c4f05add7242a179ecad79400e2e793bf46d52f4a3342f
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://ttraff.link/123?keyword=matt+loter+apology In PDF document text
    • https://ganizosu.weebly.com/uploads/1/3/4/4/134434359/femoto-xigexodisun-dubuladu.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/punafejolujediguvev.pdfIn PDF document text
    • https://nigokozop.weebly.com/uploads/1/3/4/4/134436215/xorasepin.pdfIn PDF document text
    • https://gemamiji.weebly.com/uploads/1/3/4/3/134372226/5589014.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/zikoviwodedupili.pdfIn PDF document text
    • https://nadosivilir.weebly.com/uploads/1/3/4/3/134316305/4432241.pdfIn PDF document text
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/zefotota_witejoponexofe.pdfIn PDF document text
    • https://zumavekuganupa.weebly.com/uploads/1/3/4/3/134366180/7820567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_5f91b99c08a8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005d43.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005d43.bin)
    • https://s3.amazonaws.com/pujirageg/herrin_illinois_high_school_graduation.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/big_text_faces_copy_and_paste.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/package_disabler_pro_9.8_apk_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/yamaha_majesty_250_manual.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_off00005d43.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D43 4916 bytes
SHA-256: 51f0b204b3b2f3667a95e30527bbe0a94aa1dab9390b6224a94a0228fcd35b04
font_01_sfnt_off00006e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E23 10500 bytes
SHA-256: 0e81c93c8830bdacc6e9d1ab65ec92652bb11000997473ef90c4620d82ece91d