Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e15bee350b73fbb…

MALICIOUS

PDF

54.7 KB Created: 2020-10-10 03:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 271bd1200b6c24585eb606925e504796 SHA-1: ec37ce0d14c707103b03131ae4e9525d37b84de9 SHA-256: 4e15bee350b73fbbf84b31d85b42f9012579eedbba867d63d6163b72484474ae
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=hobgoblin+and+green+goblin+marvel In PDF document text
    • https://site-1040613.mozfiles.com/files/1040613/sodugamuwugajiwiwibavakam.pdfIn PDF document text
    • https://site-1038407.mozfiles.com/files/1038407/redajilolevid.pdfIn PDF document text
    • https://site-1040144.mozfiles.com/files/1040144/97769259228.pdfIn PDF document text
    • http://soxomuto.honorflowers.com/uploads/1/3/0/7/130775934/vamawaj_lujadurusiju_dupajebezowezu.pdfIn PDF document text
    • http://files.daneacosseni.com/uploads/1/3/2/6/132681946/difenuxifaliku-femavepuwum-gupemijitu-vigexo.pdfIn PDF document text
    • http://pobaro.theworksofeugene.com/uploads/1/3/1/3/131398455/pegajojagikex.pdfIn PDF document text
    • https://site-1036972.mozfiles.com/files/1036972/maduwajotifokidureler.pdfIn PDF document text
    • https://site-1036997.mozfiles.com/files/1036997/53278476366.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/36373040421.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4495/3509/files/valve_keeper_tool_harbor_freight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6991/3753/files/hills_like_white_elephants_sparknotes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B1 5128 bytes
SHA-256: 2a9b5eb0782e44ec9178ebf73ebbbcdf86f7f968f8cabf4172b1013f3900dd67
font_01_sfnt_off0000ab14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB14 10148 bytes
SHA-256: 3719703d970dd1c234ceccd9312fc40b8e14be2a190c2019e91994947aad4599