Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1bd4c142c07d66…

MALICIOUS

PDF

72.3 KB Created: 2021-02-15 15:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9132ac84df2df877d7a6ef7a50d16200 SHA-1: c9b75af33fd822bd894e1b8bd9356be64c9c2696 SHA-256: 4e1bd4c142c07d669c26aa6e4f9b58ff8ce2286f7b0b6a45375f5dadca380a4e
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/wix?keyword=toyota+prius+manual+key+start In PDF document text
    • https://static.s123-cdn-static.com/uploads/4497650/normal_5fef15498f174.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379371/normal_5fc874af1b3d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476010/normal_5febdffce1668.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446650/normal_5fccd5b2bd2af.pdfIn PDF document text
    • http://xonibiz.22web.org/vshare_for_ios_8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476010/normal_60049d39f04d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451930/normal_5fcabb814e434.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kenovog.rf.gd/the_boondocks_season_4_zip.pdfIn PDF document text
    • http://pobediwawe.epizy.com/shannon_diversity_index_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/information_about_indian_air_force.pdfIn PDF document text
    • http://bawilifugoxak.epizy.com/bseb_10th_result_2013_full_marksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/xuruw.pdfIn PDF document text
    • http://zekubegem.epizy.com/button_style_generator_android.pdfIn PDF document text
    • http://nabepazefesuju.epizy.com/65577070755.pdfIn PDF document text
    • http://juxugalipexobow.epizy.com/vesebemagodali.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/98582214176.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_off0000dfbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBD 5080 bytes
SHA-256: 122b8d39589e227734396b0f387f81a590530c80a81e8f4bb122d17bcd1085e9
font_01_sfnt_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 10416 bytes
SHA-256: 22fbb6c1acc20567af1f9f59d8601443f1bfbac4db863f1ea3c05348e658616b