Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dfa38d5fb0431b5…

MALICIOUS

PDF

45.8 KB Created: 2020-10-11 10:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 45752c7f12eef608fc61641617cd2cd8 SHA-1: e8d5a5dfdb01ee1538af6b498deee84e23a41a98 SHA-256: 9dfa38d5fb0431b5065659e935a91d7004169b1912b29b0bd6159529c3fe46c4
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=commercial+air+compressor+hose In PDF document text
    • http://forenofe.blueanimalmusic.com/uploads/1/3/1/3/131382531/dojilowagirexuxu.pdfIn PDF document text
    • http://wixagika.batteryparkchristianchurch.org/uploads/1/3/1/8/131856646/zasefakilari_tuxuvi_xizeromo_virufopuzitul.pdfIn PDF document text
    • http://serodopo.trinitylutheranelgin.org/uploads/1/3/1/3/131398591/1f3aadbed84c.pdfIn PDF document text
    • http://gemukajoj.jpsousanhsband.com/uploads/1/3/1/4/131454521/kudufafujopovifo.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/1/0492/3211/7916/files/89804076620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1388/0483/files/rigujodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4593/6535/files/how_do_you_play_tchoukball.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/write_a_full_class_definition_for_a_class_named_gastank_and_containing_the_following_members.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5573/7753/files/chicago_title_land_trust_skokie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6464/0159/files/wigekemuvozaxepewedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca8f545-1f03-49f3-b0fe-2d26be8bc5a9/21409377321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/097043eb-99b5-4c36-8988-3435b6a942fd/97946530027.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_off00006b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B54 4800 bytes
SHA-256: 06793afaaf754e65f1eddd251cf02a217ea846e998298c6e25d4b6159bf69db9
font_01_sfnt_off00007b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B88 9508 bytes
SHA-256: 492273ee3ff8c7e22872a09848799f5d59ba41407d3b8bce9061a381676d84ce
font_02_sfnt_off00009c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C0A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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