Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc727d172eb712af…

MALICIOUS

PDF

38.2 KB Created: 2020-10-15 13:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 20a8cfaec385b8b883c9683433472180 SHA-1: 6ad0fbe8544235f3e63a426f7e82b0ba9e50e43b SHA-256: bc727d172eb712af7980531771c3a52652a8b7877de5f3d3d86d89db3e2c3c78
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/strik?keyword=xiaomi+mi+vacuum+cleaner+manual In PDF document text
    • https://site-1037203.mozfiles.com/files/1037203/61419526596.pdfIn PDF document text
    • https://site-1039642.mozfiles.com/files/1039642/ruroxedoji.pdfIn PDF document text
    • https://site-1041405.mozfiles.com/files/1041405/ziduseripitif.pdfIn PDF document text
    • https://site-1041854.mozfiles.com/files/1041854/15464588023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f874e18382c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f875216077da.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://uploads.strikinglycdn.com/files/9913cf8c-9c0c-4445-867b-3ff36f1f4bb9/nedavef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c43998c-0cf7-40f3-a8ae-f42ee6de2d2e/26032523940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0164ed5-5eb0-45ae-ba9b-4bdb29cd147e/fodazelexexus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de297d5-f7f6-461b-8748-e55c66e01720/28149351235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/456f2130-1840-4517-b407-48e23e0994df/31780481033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0203be1e-544a-4e05-aa57-406c23e06d52/nitogupomovubuzobezubobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf34cd39-a51d-4d1c-a30a-ded1c4914caa/88752557948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/920ebac3-942b-4394-a95b-083d7fef1512/bokivena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1102/3270/files/wow_addon_3.3_5a_recount.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1118/9147/files/a_dolls_house_time_period.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2341/4942/files/81152880260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8062/8889/files/pasaborulesopodotodikos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4062/2760/files/dspic30f_family_reference_manual_ds70046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/29452158610.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_off00004ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC3 4608 bytes
SHA-256: ea245b36ab06264c6f63b27b6fddd6d660e9ffa3402d82cacc93b3481b977e33
font_01_sfnt_off00005a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3D 10228 bytes
SHA-256: 8003d25a7574ab3c3bc298e7c0a6d99609c19459f88d680a873dff59c28a3e34
font_02_sfnt_off00007d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D46 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c