Malicious PDF — malware analysis report

Static analysis result for SHA-256 af802cebb6b45689…

MALICIOUS

PDF

72.9 KB Created: 2021-02-11 21:18:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: adfed5f9e98418d4aebc428c37070ab9 SHA-1: 39922581e870662d485e2b316daeba3b015195a9 SHA-256: af802cebb6b45689bb711b3b5fa90d9ef4504aeacc6f6854a1799117dea5d77c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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://yafferge.ru/wix?keyword=matoaca+high+school+principal In PDF document text
    • https://ribebofav.weebly.com/uploads/1/3/2/6/132681502/629412fe49584db.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/89081880648zkn99.pdfIn PDF document text
    • http://dorightschool.com/jixaxogd59pp.pdfIn PDF document text
    • https://xibowawagapuj.weebly.com/uploads/1/3/1/3/131383975/860919.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386087/normal_600208ba5aef7.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/wikuda_kubopedinavunun_jufaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402250/normal_5fe254d0b7878.pdfIn PDF document text
    • https://wusuritod.weebly.com/uploads/1/3/0/7/130739885/wozelalejiri.pdfIn PDF document text
    • https://garekaxini.weebly.com/uploads/1/3/0/7/130739167/gefasekuvexijili.pdfIn PDF document text
    • https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/bdb4546d6872926.pdfIn PDF document text
    • https://cdn.sqhk.co/bowewulaxam/Umg2ZDF/power_warriors_mod_apk_12._0.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/4530208.pdfIn PDF document text
    • http://reactivascotia2020.com/dragon_block_c_recipes2757c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_600cb42312e59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/safago/advanced_vocabulary_word_list.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_off0000e278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE278 5200 bytes
SHA-256: f833eecdad6405feb713fbbfbfd21e25ecbc5c667f0f103374e44218897a28c6
font_01_sfnt_off0000f42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42F 10196 bytes
SHA-256: d023f41262f1a1415c6f9c42cf3118de05800a8b960c89e3aeb83b986e9f5364