Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f54fc11c6a27f27…

MALICIOUS

PDF

37.9 KB Created: 2020-11-07 13:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: af202f8ee3486b2a76432a8b99729b20 SHA-1: aafefa4c9026a44cb1439c198ffa132073e8f499 SHA-256: 3f54fc11c6a27f27d77ed134748e3fa89c6a25f16b1e8e93050eabdd846f67dd
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/aws?keyword=st+catharine+church+columbus+ohio PDF link annotation
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/91bcc01b89.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://s3.amazonaws.com/wovigebi/tujetozope.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/94941074121.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/right_to_life_of_michigan_history.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/chicken_biryani_recipe_in_kannada_language.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/81669378525.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/zimitedikifinubedu.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/44613846432.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/myaarpmedicare.com_2020_drug_list.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/36162847041.pdfIn PDF document text
    • https://rotadenig.files.wordpress.com/2020/11/82236523173.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/68546072100.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/earn_to_die_2_unblocked_games_6969.pdfIn PDF document text
    • https://teviwuder.files.wordpress.com/2020/11/gakiv.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/collaborating_and_partnering_answers.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_off0000488d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x488D 5164 bytes
SHA-256: 012c1dd050ef05bf9e276cc4e3ae0136358f0521af3302bb845d2432d2604124
font_01_sfnt_off000059d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D4 10212 bytes
SHA-256: c7f9dd4bf48e1444b5e0ae18aeb8da637ef707a0a02bf24bde3af10fca64cf5c
font_02_sfnt_off00007c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c