Malicious PDF — malware analysis report

Static analysis result for SHA-256 835eb50b14606834…

MALICIOUS

PDF

72.5 KB Created: 2020-12-23 10:10:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6d47e81c5453ec5b61eb8aecaaa433ce SHA-1: edd654123f3fc34bb31274e6cc722c46a5094a87 SHA-256: 835eb50b14606834a5e40a53d58535a81696cdc0539c399f6cbedd26cae55cc8
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious or unknown domains, indicating a link farm for SEO manipulation or phishing. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to 'quitclaim deed california example', suggesting a lure to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffking.ru/123?utm_term=quitclaim+deed+california+example In PDF document text
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/memakawum_ripebowinifama_repunerenogiv_pesoxa.pdfIn PDF document text
    • https://tebifuwufarul.weebly.com/uploads/1/3/4/8/134886387/1f345c6ed484.pdfIn PDF document text
    • https://tujigagozevako.weebly.com/uploads/1/3/4/2/134266307/lofasimogegovev-zogarezonudev.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/e68e4a.pdfIn PDF document text
    • https://daxuferawul.weebly.com/uploads/1/3/4/5/134592581/pexexozanomawo.pdfIn PDF document text
    • https://zirenujunez.weebly.com/uploads/1/3/4/4/134431605/bd4de50a.pdfIn PDF document text
    • https://sotubuponin.weebly.com/uploads/1/3/4/6/134644868/xepefe.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/aea74.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/7d0b70af1a124.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc06b148139af037642cc0d/t/5fc2150718e72e5fdb1f89e7/1606554896246/lion_company_accepted_a_15000.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d031e2fce462bcad9e70/t/5fd5f1895b1f6f7539cbdfc8/1607856522610/plague_inc_fungus_guide_brutal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfcc855fb7d01a9b0f17d4/t/5fe033398afbbc27178a5cf2/1608528698945/chamma_chamma_new_song_dance_video.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6a877acac6192ab96040/1606380167378/10408429505.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e0f3f7cf8c75402ad020/t/5fcb3ac426a2be7f6de10bd3/1607154372734/zarchiver_download_apkhome.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_off0000ddf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF5 5252 bytes
SHA-256: de78f498695b3e9c40c4550d8e35322a6656466cc562b1800b5475f667177422
font_01_sfnt_off0000efc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 10940 bytes
SHA-256: 9cb6f0060452f006cff2b50fd613151a72da0d20081a897188b5bf03de038b7a

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