Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c9092fdae5d06d…

MALICIOUS

PDF

39.4 KB Created: 2020-10-08 17:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: ada23a356218616be2eaad999eb13e01 SHA-1: 6425e38d1f72caba6e4fa4b8155ab1f352b63682 SHA-256: 43c9092fdae5d06d4ff62a571f40a6a60110a71156dbe5c2fc39bc3209478b55
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/pify?keyword=kaufman+county+tax+office+terrell In PDF document text
    • http://files.nsnamidyear.org/uploads/1/3/0/7/130738641/xifupoz_jarazewujadon_fasuke_podenekezoxa.pdfIn PDF document text
    • http://gezowize.nategrillscholarship.com/uploads/1/3/2/8/132814930/vufarom.pdfIn PDF document text
    • http://files.whitegallowaysofwayby.com/uploads/1/3/0/8/130873907/fewubogukobavel-sixomolimu-mifip.pdfIn PDF document text
    • http://files.waxjewelrydesignstudio.com/uploads/1/3/1/6/131637103/5309092.pdfIn PDF document text
    • http://files.richardblakeweddings.co.uk/uploads/1/3/1/3/131383750/6966323.pdfIn PDF document text
    • https://site-1040513.mozfiles.com/files/1040513/pojan.pdfIn PDF document text
    • https://site-1036796.mozfiles.com/files/1036796/wowel.pdfIn PDF document text
    • http://jufuzab.wildandscenicnashuarivers.org/uploads/1/3/1/6/131637309/lazalenabi_dupedojan_dazudimowamanav_ravasog.pdfIn PDF document text
    • http://nurekad.evilstrength.com/uploads/1/3/0/9/130969587/2325731.pdfIn PDF document text
    • http://files.pacingpics.com/uploads/1/3/1/3/131398194/zobit_majulobufomufo.pdfIn PDF document text
    • http://files.cheyennepuga.com/uploads/1/3/1/8/131856435/gigemodeta_dujuvop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8202/3073/files/41832148268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6626/4214/files/meet_me_at_the_hotel_tik_tok_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8159/9643/files/24_hour_fitness_boulder_instagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8181/7494/files/japudovuvajuton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/nuwetilivesapoxapolinadug.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FBF 4868 bytes
SHA-256: 2967869c158329126c4ecfae4749b77fbd2edbe770e07e69214b0d4f08a85995
font_01_sfnt_off00006043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6043 10016 bytes
SHA-256: 0cde6e095a782686acbd81936f772ddcb485eb5bf00a51e96abe108e61b6deaf
font_02_sfnt_off00008262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8262 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c