Malicious PDF — malware analysis report

Static analysis result for SHA-256 947bf361be2ec35b…

MALICIOUS

PDF

51.8 KB Created: 2020-10-14 14:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b8feb7167a75f2de542870dd94eaf316 SHA-1: 93bf756210ae583b60e73c7f366d84386572aec4 SHA-256: 947bf361be2ec35bcfb555a0c5a00d9d57b886a22443074dd35c7ecac4b66d83
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=gif+loader+android+github In PDF document text
    • https://site-1045415.mozfiles.com/files/1045415/33228273037.pdfIn PDF document text
    • https://site-1042492.mozfiles.com/files/1042492/13738190045.pdfIn PDF document text
    • https://site-1048488.mozfiles.com/files/1048488/xijakuwagira.pdfIn PDF document text
    • https://site-1039547.mozfiles.com/files/1039547/nerijagude.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.pdfIn PDF document text
    • https://site-1036748.mozfiles.com/files/1036748/66891494953.pdfIn PDF document text
    • https://site-1038475.mozfiles.com/files/1038475/19765156131.pdfIn PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/30692538380.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/8536469.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6552 5164 bytes
SHA-256: 072ca833858b2d1bc6c73867745428b8eeffb909825719193246960115f617c1
font_01_sfnt_off000076d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D2 1936 bytes
SHA-256: cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d
font_02_sfnt_off00008011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8011 12652 bytes
SHA-256: 0519cdcd8de9434403cb3f302e9a506cf9cdfd44064abb36b2b6c3eefb68d8ad
font_03_sfnt_off0000a9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A0 16956 bytes
SHA-256: ade738c7c3d7a28a4ebc73684b59e962eb94245f4c40e8cc640f8235051d0608