Malicious PDF — malware analysis report

Static analysis result for SHA-256 7439bd2cc7c12567…

MALICIOUS

PDF

47.6 KB Created: 2020-10-25 15:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ac3fdfa4275fe1deec9ce5aa6300fe1b SHA-1: 7d9003cd03832c1b6cec0e0b09517a9cc1339e3c SHA-256: 7439bd2cc7c12567a73322d9f91eada275636e4440f1e9371dd089e2013afc20
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://ggtraff.ru/123?keyword=oxido+de+magnesio+usos+pdf In PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/zebago_wiwogaso_pokumoluka_sokofikoxawoza.pdfIn PDF document text
    • https://pubetisor.weebly.com/uploads/1/3/4/3/134348812/fd1da.pdfIn PDF document text
    • https://sakeneri.weebly.com/uploads/1/3/4/3/134339958/vazuk_bubokir_xominorabimok_zanepux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_5f8fd3b1bf7c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f89800ac76a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391624/normal_5f93fb9564c25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376127/normal_5f8b435c4a59b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5f8f5dfd03114.pdfIn PDF document text
    • https://xexegetogud.weebly.com/uploads/1/3/4/3/134375989/lomakukorebazepagomu.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/metugobiresa-dojexodibix.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/2953665.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/bb2cac.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/dufagasiso.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/e9bac172f8.pdfIn PDF document text
    • https://nutefowamedez.weebly.com/uploads/1/3/4/3/134330341/wuxixo.pdfIn PDF document text
    • https://kobijetiva.weebly.com/uploads/1/3/4/3/134322382/b0915b420a1c08a.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/1/0486/5608/9256/files/adb_fastboot_flash_tools_android_5.0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/fauna_da_caatinga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/proof_divergence_theorem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8924/7399/files/connect_android_phone_to_homegroup_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/rgb_color_codes_skin_tones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9383/5432/files/98446147339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/63875751387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/bsc_agriculture_colleges_in_karnataka_download.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_off00006bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF3 5132 bytes
SHA-256: bcc6db9db37b41f8f7969dcfa082e543b407bebd5d946bd290aba3d4bbd2c732
font_01_sfnt_off00007d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5A 11148 bytes
SHA-256: 9f79d9a46093f6a0e1f225ab120f92c65eb6a19495e5ef883e2dcfd787ffa97d
font_02_sfnt_off0000a175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA175 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176