Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b90d2ec052e54a…

MALICIOUS

PDF

72.4 KB Created: 2021-03-04 18:12:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 49f25664e851b7ccd93ca051d879b308 SHA-1: 963003785f0f10839feeb7f71c830f6ffcb3cccf SHA-256: 05b90d2ec052e54ae0e342ebdc6177dcbf7d82196c9e83ecee28b7924e575b8e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=criminal+defense+attorney+phoenix+pro+bono PDF link annotation
    • https://navikeput.weebly.com/uploads/1/3/4/7/134755574/fe78579d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388289/normal_5fe2c74b4abeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414514/normal_5fd1c9f720783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470535/normal_6035a263207b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380695/normal_5fe5ff30b0f87.pdfIn PDF document text
    • https://kaxojolomo.weebly.com/uploads/1/3/4/8/134885197/6174778.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/kapava_desawasom_kizanigasutifu_tijij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tofizo/carlsberg_group_annual_report_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/491edba9-db34-4de6-9c14-4c932f599ceb/samsung_frame_tv_remote_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f8496fa-05fe-4d58-be9e-36c728fc62a8/where_can_i_buy_wood_from_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea63430e-c50e-4ced-b7f3-94dcb54eea1d/scary_stories_to_tell_in_the_dark_alvin_schwartz_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3ac209-5af3-478a-84dd-3d3f22aaf454/fesenoxebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe96742-490f-469a-9ab8-4716b1a9473e/lexoduvutowezokoreduxumux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2037832-483d-4d4f-9a04-3e1ca12e0fe6/cepher_bible_app_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e868b32-8a81-4793-97b6-93b3e1c3f779/music_business_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/75335227896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f91e41-2d15-43e4-babb-5165cf069e2f/gunexafuzogerob.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/wesoxurubela.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAA 5496 bytes
SHA-256: 10981297290257be3710854d08823ffdd7bd8672163059bdd979f0c263e9e1fc
font_01_sfnt_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 11404 bytes
SHA-256: dd5d335290607ba220224b31228ce10582fcbbbfff4db7a6d6628924849e9e45