Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56ccd41c83661f7…

MALICIOUS

PDF

42.4 KB Created: 2020-11-09 11:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: d9cef1ff8d861a69ee1a53eb2010dbbf SHA-1: c2057c0acf04d84e92b7b41ddd504f87a2ba4ed4 SHA-256: a56ccd41c83661f7f31d2fc69f44dd6783e5458ba4bb843462c16db06f7d2c51
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/aws?keyword=direct+tv+now+app+download+for+kindle PDF link annotation
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/rekawujibawilisuzak.pdfIn PDF document text
    • https://tamegafatukof.weebly.com/uploads/1/3/4/4/134400059/b6d707a.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://gelolote.files.wordpress.com/2020/11/26960002118.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/78085046054.pdfIn PDF document text
    • https://vitubadedew.files.wordpress.com/2020/11/jejogofugoweduvegiradi.pdfIn PDF document text
    • https://wojadinito.files.wordpress.com/2020/11/scandinavian_ceiling_fan_manual.pdfIn PDF document text
    • https://veliliga.files.wordpress.com/2020/11/naxoju.pdfIn PDF document text
    • https://paduduruvaz.files.wordpress.com/2020/11/abnormal_psychology_by_david_barlow.pdfIn PDF document text
    • https://rupuxijod.files.wordpress.com/2020/11/manof.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/example_of_double_bubble_map.pdfIn PDF document text
    • https://jilalilijox.files.wordpress.com/2020/11/jejudobilomavu.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/ncert_biology_class_11_chapter_1.pdfIn PDF document text
    • https://wizugovo.files.wordpress.com/2020/11/24048093958.pdfIn PDF document text
    • https://rukawakoxofo.files.wordpress.com/2020/11/coordinate_grid_pictures_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/popagexexoza/ikariam_guide_beginners.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B9F 4976 bytes
SHA-256: a6cf80ae289b284e4e4aa5249caf4e760732cb4ca3dd7e0bc5193890a93e1878
font_01_sfnt_off00005ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA6 2140 bytes
SHA-256: fa98316bad0ee393e4244be63b1d230beb4724cf855be96ad4f2c87a5b302ae2
font_02_sfnt_off00006680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 11080 bytes
SHA-256: 40afd25639408cb0598dd04099bc2c76c7741fea9713a77b4beaad93d5d2126d
font_03_sfnt_off00008c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C28 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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