Malicious PDF — malware analysis report

Static analysis result for SHA-256 43cc3fb08a6e0a9a…

MALICIOUS

PDF

44.3 KB Created: 2020-10-16 18:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: 8642e9085822fbcac246d0e550e1ce30 SHA-1: 6ef55ef892f5a28b5347ffe801496e1291c39ba2 SHA-256: 43cc3fb08a6e0a9ab3095c5fdc555c9e006ac8694aed873949ee7564e798ffbc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed to distribute malware or phish users. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL leading to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, potentially leveraging embedded JavaScript for obfuscation or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=ceza+hukuku+genel+h%2525C3%2525BCk%2525C3%2525BCmler+pratik+%2525C3%2525A7al%2525C4%2525B1%2525C5%25259Fma+kitab%2525C4%2525B1 In PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/8d6f517714f66.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ligewajinaxi.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/f4cd92492c37.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/wumodasajarubam.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/2919036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f88b49c792c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5f88b49283677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f874be916141.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.pdfIn PDF document text
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/b3ddd1a49eac2a.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/nexuwewapad.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/1809582.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/fuxedogibiniwuw.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/movozitesuwa.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/f90bfcf4821.pdfIn PDF document text
    • https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/8670028.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/1/0476/7164/0230/files/google_app_for_hotmail.com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2677/0852/files/holcomb_school_district_staff.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8320/9373/files/pedro_suarez_vertiz_hijos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7522/3206/files/is_omnicard_safe_reddit.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_off00005bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBF 5688 bytes
SHA-256: de537940e4e494786637cfd3b635b9bd7caed97c765840f44d4ac132d7f54156
font_01_sfnt_off00006e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E88 11872 bytes
SHA-256: 339d1df73c6c5c2f5891e2de8dcd36e585e5bd8854e190e551ad71fda7db7b81
font_02_sfnt_off0000930a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x930A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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