Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9195defcef88496…

MALICIOUS

PDF

67.4 KB Created: 2020-12-26 22:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47d4f6cd691843699da257e0406b3473 SHA-1: 74e336c04d80bd300c819a43d747be1fb341aa6f SHA-256: d9195defcef88496759e1e8a276cd3b876eb9898767aa2cc1dbaddb7913ace57
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The primary attack pattern involves luring users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/aws?utm_term=folly+beach+surf+report
    • https://zireguxeked.weebly.com/uploads/1/3/4/8/134863403/f49a2e4cb0.pdf
    • https://jaduxopedarev.weebly.com/uploads/1/3/4/7/134749363/sakikawomupajor.pdf
    • https://piziwola.weebly.com/uploads/1/3/1/3/131382430/votuleneluw-joxuru-pekafap.pdf
    • https://xemakoxen.weebly.com/uploads/1/3/4/3/134320116/jezanulewujigotik.pdf
    • https://dipitamadupod.weebly.com/uploads/1/3/4/8/134882687/jurexibigisom_bapepipijatez_zapapobusi_sopebewijokine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gawabog/cue_card_topics_2019_with_answers.pdf
    • https://s3.amazonaws.com/pujirageg/3468291446.pdf
    • https://s3.amazonaws.com/tarizirefevifab/bombay_dyeing_bed_sheets_near_me.pdf
    • https://s3.amazonaws.com/gonima/autonomic_nervous_system_disorders.pdf
    • https://s3.amazonaws.com/pajeriramal/22081967241.pdf
    • https://s3.amazonaws.com/nefagolom/99435201017.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/acer_aspire_e5-_511_manual.pdf
    • https://s3.amazonaws.com/kudowo/best_android_cleaner_app_apk.pdf
    • https://s3.amazonaws.com/dazutun/nosufajesimuje.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb0c.bin
0cfb64f23c98006727e914715bff12b0b926e915a2c5cfdb8ad0760d715f3b6f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0C 5300 bytes
font_01_sfnt_off0000dd12.bin
e0691265aaab6e9678f4246b5bf09c3bc9534f2485b688caae73aa047c36f105
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD12 10316 bytes