Malicious PDF — malware analysis report

Static analysis result for SHA-256 e859f7c809c542a2…

MALICIOUS

PDF

72.2 KB Created: 2020-11-19 18:12:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2c0ec8456ffc584779f99af17f8c506d SHA-1: 6d58282c1a48a6a4ec352f5900946ed15cd3c2e5 SHA-256: e859f7c809c542a2b080ca0dae9a56b9a6530987e30c964f94ab3012c3d2633f
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://ggtraff.ru/aws?utm_term=guided+reading+activity+16-+3+quizlet In PDF document text
    • https://dedezeke.weebly.com/uploads/1/3/4/4/134494225/5365272.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/jilejobelado.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/63dba5a1d.pdfIn PDF document text
    • https://papilezuserif.weebly.com/uploads/1/3/4/4/134437149/milibo.pdfIn PDF document text
    • https://nizomepovunamox.weebly.com/uploads/1/3/4/3/134305669/6155077.pdfIn PDF document text
    • https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/8339796.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/9122877.pdfIn PDF document text
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/mirajafutori_xerasefezivuf_bawojag_sijaguki.pdfIn PDF document text
    • https://vuwakoge.weebly.com/uploads/1/3/4/3/134368269/1349183.pdfIn PDF document text
    • https://tejojapifofomo.weebly.com/uploads/1/3/4/3/134339563/fedoteru-muzop.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/bivanud/vidowutitufirixim.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/imperator_for_rome_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf61e6c9-a6a0-4bd8-866d-040dcb008192/73381513661.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/4414921335.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_off0000dbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF1 5700 bytes
SHA-256: d1137a8660c6169eccb856740b6c402918873b24c37c2e43e5f962c4dd4ce9dd
font_01_sfnt_off0000ef7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7E 10788 bytes
SHA-256: fc5213348079795dd7c44951457aaa40d055631665264e839b44babb0f686eb0

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