Malicious PDF — malware analysis report

Static analysis result for SHA-256 6940ef397fdda929…

MALICIOUS

PDF

81.7 KB Created: 2020-11-10 12:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8ac39183ab1d346d37ade016478c357e SHA-1: 950a3ea54dbb5b549bb0fce512932ba804d4983d SHA-256: 6940ef397fdda9297851c90e556aa1c5d9fe9bcd5724103467a55f7a12ee5309
304 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and known malicious redirectors. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' specifically identifies an attempt to phish for Apple credentials. The presence of numerous links suggests a link farm designed to distribute malicious content or facilitate phishing, likely leveraging embedded JavaScript to handle redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://menelaxewo.weebly.com/uploads/1/3/4/3/134362368/7346371.pdf.
  • 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://traffmen.ru/123?keyword=real+skate+mod+apk In PDF document text
    • https://menelaxewo.weebly.com/uploads/1/3/4/3/134362368/7346371.pdfIn PDF document text
    • https://dofikusoru.weebly.com/uploads/1/3/4/4/134472045/1000342.pdfIn PDF document text
    • https://zukinubugepar.weebly.com/uploads/1/3/4/5/134514864/02cef11fc8add3d.pdfIn PDF document text
    • https://vujerige.weebly.com/uploads/1/3/4/4/134467486/6efbe9515659.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/2612681.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/9b764fd9a.pdfIn PDF document text
    • https://zisogojevup.weebly.com/uploads/1/3/1/4/131453725/8ae084c7b0889.pdfIn PDF document text
    • https://fijateri.weebly.com/uploads/1/3/4/3/134371572/4ebe084.pdfIn PDF document text
    • https://xitirume.weebly.com/uploads/1/3/4/3/134392652/00ef02a6.pdfIn PDF document text
    • https://fojejebub.weebly.com/uploads/1/3/4/2/134265807/4412746.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/punename.pdfIn PDF document text
    • https://dasowafajego.weebly.com/uploads/1/3/4/7/134723411/latesid_xepawusekeju_kikuti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/firigugixujotov/jakakovezatofomeririgud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a0f847-9cb0-4eeb-be2c-d2910ff98650/niveles_de_lectoescritura_margarita_gomez_palacio.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/15993697280.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70C 4712 bytes
SHA-256: 21e46a1c9faaf55d2958148f5034472bb5e0a8f40e30b59475453e2705f8aede
font_01_sfnt_off0001071f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071F 10788 bytes
SHA-256: 88af4039ad208509f355a873126c920990fb79f51b85c1182eb6a06a20b68151
font_02_sfnt_off00012bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f