Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc678d4b2983b4a6…

MALICIOUS

PDF

69.1 KB Created: 2021-04-04 02:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4e3304f932e170430d271de1c8df6e00 SHA-1: f1d124ac37142afd63b023f90c447f9ea6b64ca5 SHA-256: dc678d4b2983b4a66af68aaae616c8c266065044d95acf1d5a6cc2989ef545a3
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one prominent URL leading to a redirector. This suggests a phishing or scam attempt, likely to trick users into downloading further malware or visiting malicious sites. The ClamAV detection and ML classifier further support its malicious nature, indicating it's a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7830

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/strik?utm_term=native+instruments+traktor+kontrol+s4+mk2+dj+controller+review PDF link annotation
    • https://cdn.sqhk.co/zifiguwosu/iifdggt/movie_maker_free_online_without_watermark.pdfIn PDF document text
    • https://sipovabamekejo.weebly.com/uploads/1/3/5/3/135391609/bemaju-zejepur.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/Eibjggd/wordpress_plugins_url_not_working.pdfIn PDF document text
    • https://nedagipi.weebly.com/uploads/1/3/4/7/134724638/7102648.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/b9ae12d72.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikifefisu/z9ibEic/app_cache_cleaner_free.pdfIn PDF document text
    • https://xugeguva.weebly.com/uploads/1/3/1/4/131438310/4579477.pdfIn PDF document text
    • https://kiloxuloje.weebly.com/uploads/1/3/5/3/135398856/xemimuvodikaxafiz.pdfIn PDF document text
    • https://wajefoxefibivi.weebly.com/uploads/1/3/2/8/132814680/sibizi.pdfIn PDF document text
    • https://wotawodakel.weebly.com/uploads/1/3/5/3/135316359/dexoki-rupom-dedatadig-zanafolaj.pdfIn PDF document text
    • https://mazogerivajusem.weebly.com/uploads/1/3/4/3/134341978/65e8f90d64.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/Icji8gc/tab_s4_live_wallpaper.pdfIn PDF document text
    • https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/6333499493fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/battlenet_client_slow.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/3d_max_2010_crack_file_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/5732211085.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/ecargo_holdings_limited_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/wufifexuwadomadiwonixopot.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/5066684756.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/audio_choice_c100_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/47283621888.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/99490527027.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/bipovetaja.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/the_quran_and_kafir_book.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/74870447736.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C5 5564 bytes
SHA-256: 5c46337f6caa7ad57a34d60d762d696bda36d8604a5569c708eef544ce942baf

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