Malicious PDF — malware analysis report

Static analysis result for SHA-256 70839ad6625c2580…

MALICIOUS

PDF

71.5 KB Created: 2021-02-21 02:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6245b84f59cadd413636f3f5aef9e3bf SHA-1: 77a764a72cca4b224fc78b826470111dfd48a6a2 SHA-256: 70839ad6625c258081776ac1e8fcbcb50b414a236f6d955ab3001d4d693b89c7
244 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
  • 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://crophysi.ru/wix?keyword=homedale+middle+school+staff In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_60103a5ce783b.pdfIn PDF document text
    • https://dulewidojupetor.weebly.com/uploads/1/3/2/6/132695372/5328980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377717/normal_60257ef2319ba.pdfIn PDF document text
    • https://toruvorunivigu.weebly.com/uploads/1/3/5/3/135317855/karomijuvola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413347/normal_60247ecc7a16c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485296/normal_600894263ef45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391621/normal_5ffec23511d1e.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/I7higdQ/superbiker_mettet_2018_results.pdfIn PDF document text
    • https://cdn.sqhk.co/suzironanes/heigdic/89058657218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_601f11db11da3.pdfIn PDF document text
    • https://jivenikovo.weebly.com/uploads/1/3/4/3/134308789/e6abbaad9307c0.pdfIn PDF document text
    • https://bowonalixatan.weebly.com/uploads/1/3/5/3/135347428/6146007.pdfIn PDF document text
    • https://loloxemevo.weebly.com/uploads/1/3/0/7/130739498/tofafipofakor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491673/normal_5fedf832b5d34.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/WLP4AGF/pewdiepie_height_celeb_heights.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459479/normal_5ff1af195c00e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_602370dedd648.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/bxhdMgg/51254684781.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/popisiburewixuj/90273656724.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/wixetotaribosewapifufo.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_off0000dc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0F 5128 bytes
SHA-256: 834cbc8daf279304758972322e8986fa083c186487bbb94ee87ff0383ccbd758
font_01_sfnt_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 10440 bytes
SHA-256: bd3a3121a1a8871fbf77e1af5c1466fddfae33b208079715ad527bf7d5037868

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