Malicious PDF — malware analysis report

Static analysis result for SHA-256 af51aa682019c317…

MALICIOUS

PDF

67.3 KB Created: 2021-02-23 01:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e3bf76bd4d4bf76b3b11bfbd48a08fbc SHA-1: 3f0fbb7430bd3ed97bba707d8c81563d1d4743f1 SHA-256: af51aa682019c317a7eb9b8685492ce98bd5e49a06f7f64299afd99de116dc29
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/wix?keyword=to+build+a+fire+cause+and+effect+worksheet+answers PDF link annotation
    • https://vaseviga.weebly.com/uploads/1/3/3/9/133986607/mofuzefurofanan-kadeb-rudolededimifo-rijujinesazogo.pdfIn PDF document text
    • http://banoduber.iblogger.org/cessna_150_vs_172_performance.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472200/normal_600336252ec81.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/jbgeqia/38478588706.pdfIn PDF document text
    • https://cdn.sqhk.co/rujuwawuju/fijQgjd/dragon_wallpaper_4k_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/chij6ie/55933704001.pdfIn PDF document text
    • https://ninujesifig.weebly.com/uploads/1/3/1/4/131453022/1043558.pdfIn PDF document text
    • http://lewoluxadet.iblogger.org/objetivos_de_auditoria_de_sistemas_informaticos.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/gUhdujh/jesebowudubopitomu.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/NOjdjh5/cheating_tom_2_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/Xiaiivo/monster_shooter_platinum_edition_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/kcggigY/23957593160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_601384d8343ed.pdfIn PDF document text
    • https://cdn.sqhk.co/jovuvufoxet/fsbgggh/10559186703.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/lulelepese/javekovutokebawe.pdfIn PDF document text
    • http://garulolit.rf.gd/93876295267.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/4846819003.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/guided_reading_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/count_number_of_words_in_excel_sheet.pdfIn PDF document text
    • http://zetitovafe.rf.gd/37334128254.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_off0000c9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A3 5352 bytes
SHA-256: bc9fbc63540dc3ad436c3f29e7e26f53ae557958e6f22474fe9898ba5287c718
font_01_sfnt_off0000dbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE5 10396 bytes
SHA-256: bc0e071fda618860375d3dd539acac67c2271a643bd4e69f6ad7ecd732659ab1

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