Malicious PDF — malware analysis report

Static analysis result for SHA-256 8425183f5815455a…

MALICIOUS

PDF

58.7 KB Created: 2020-10-17 00:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0e97a7929f730ff9fef66d45f9cd4d07 SHA-1: 157ff5c30da0215a12ff94e7c2af42fc00ac0a8f SHA-256: 8425183f5815455aac40f1ddfd3824d5c2a0fd3336e54451f89a616ea4fb8fad
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • 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
  • 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://gettraff.ru/123?keyword=download+zepeto+apk+2020 In PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/jelubono.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/gevoderovepiru.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/833baccd.pdfIn PDF document text
    • https://tidoxanarapora.weebly.com/uploads/1/3/2/7/132710787/5365892.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/3323574.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/bofajifolapumalij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f871717ab464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f89db678cb76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8a0ad6a63fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369143/normal_5f893683dffb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5f8a0a4f577bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba601676-6636-4921-a386-35738a3a45fb/gulodegojiwulal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e72dff-3fc4-4b69-9806-3f70b29d85ef/85894005805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d54578c9-69b9-420b-9f1c-bf92bab78608/fajivumitifaminojomedopot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85d35f7-bdbf-4f22-b641-bb7d49cfde45/zijadomefefibogatupetuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0928/5024/files/watch_ghost_adventures_mount_wilson_ranch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0980/4960/files/68883061634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2335/8888/files/39131776414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/53693597407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7217/5772/files/standard_change_in_enthalpy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8956/3299/files/21783240256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6182/9528/files/18965284944.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1E 3168 bytes
SHA-256: ec056ee923b565603d85cdccad987de8ea15a35434b141172e52ca99a8f3ec56
font_01_sfnt_off0000795c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x795C 5156 bytes
SHA-256: 53a0583d43eeb2bc091f33873462bc3fea73a7797f6cf5d7b033f92fc09cbd29
font_02_sfnt_off00008b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B16 2904 bytes
SHA-256: 9ee7db78a680e954fc83827cb3b0ef6d483254f0c29ad6cde1ee3630ce45ecab
font_03_sfnt_off00009709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9709 18524 bytes
SHA-256: 3306c081f927f8df725c7fd61cea47ec4753c7238f7e2bf59c7685cc0121df71
font_04_sfnt_off0000c7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DC 16092 bytes
SHA-256: 5d067f3ed25c947100d6e11befc4ff8f2526c29946dd398e4c33d9c92d35bad5