Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f216bb404471b4…

MALICIOUS

PDF

69.2 KB Created: 2021-09-20 00:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6c5c7dad14a9f9f8dadcf7d6f9f49865 SHA-1: 03a32fa24c3ed7a4aed15db881b094241bc205e9 SHA-256: f4f216bb404471b443e25e809c138ea38da887be8718946d5b639f9311fa491f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

Heuristics 4

  • 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 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.
  • 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://smidgel.ru/uplcv?utm_term=connect+to+any+wifi+without+password+android PDF link annotation
    • http://agavietnam.com/img/files/lodasofekejotiwakegev.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/81763684440.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/10795854737.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/84907374938.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/fexubizenel.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1631398656_1191391126.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/30222230878.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/91543481421.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/fogisogabipojexuno.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613751eb7bb3c---kasej.pdfIn PDF document text
    • http://alacarte-husum.de/userfiles/file/nugavezet.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/kuxojejozabaruwup.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/17678384358.pdfIn PDF document text
    • https://hyosung-gulf.com/uploads/file/4906013469.pdfIn PDF document text
    • http://bellamy.tw/uploads/files/202109102320407963.pdfIn PDF document text
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/1200234003.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/wusapavisotenasuri.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/78746648126.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/54497788311.pdfIn PDF document text
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/zumimimezat.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/70108972994.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa5477c1f6---49543372148.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/biduxelaper.pdfIn PDF document text
    • http://philipsphotographystudio.com/vuxisulizof.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD619 17476 bytes
SHA-256: b9ce4de8ef9ee04ca511e742c39d3341c654152f2c1b8cbffe10ee33c9fd4df1

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