Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b9f1aae28aa3aa…

MALICIOUS

PDF

71.1 KB Created: 2021-02-21 00:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f54529ea9803e3314ebdb4f99edc2b04 SHA-1: b47b61a13b0c5fd727b6602494ddab910336335a SHA-256: e6b9f1aae28aa3aa735ebde25fca6d3fc0a27459ce0762ee45e12bb99e653240
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an MFA/2FA-themed lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/strik?utm_term=panasonic+kx-ns500+default+password In PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_5fd93e1b0d183.pdfIn PDF document text
    • http://bu-markett.com/como_buscar_mi_android_robadohnrzl.pdfIn PDF document text
    • http://regsen.website/religodaxx2uw0.pdfIn PDF document text
    • http://titonigofitazi.iblogger.org/akdam_bakdam_hanuman_video_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415748/normal_5ffcb6b0a51e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485823/normal_5ffbecdb53c72.pdfIn PDF document text
    • http://kyponnik.online/mazak_online_manualshbdsz.pdfIn PDF document text
    • http://xobuxok.22web.org/patidirifexagujukujaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455179/normal_6013347e7bc8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381105/normal_600883b32608a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406191/normal_5fd77a9415391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_6027f9d88eeca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471099/normal_5fcc0c9ddda8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465259/normal_6026670d15144.pdfIn PDF document text
    • http://avtovishki-msk.ru/iktidar_sekinleri3mg50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xezeruv.epizy.com/dixukozowirutex.pdfIn PDF document text
    • http://donirodep.epizy.com/cavalera_conspiracy_psychosis.pdfIn PDF document text
    • http://fojamemu.epizy.com/windows_7_loader_application.pdfIn PDF document text
    • http://pexivakerofus.rf.gd/megik.pdfIn PDF document text
    • http://ponurigovo.epizy.com/81506601473.pdfIn PDF document text
    • http://fopupasefe.rf.gd/upcoming_bollywood_movies_2018_trailers.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_off0000d802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD802 5672 bytes
SHA-256: 2168815c0cece3165da959663774f9b31f43a2d496461d14f20afe9a70ad24bf
font_01_sfnt_off0000eb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 10268 bytes
SHA-256: 119725f0093c1890053adc9f7a42e595f38d7eebf8c9c748df2cc4dc3e40a75f

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