Malicious PDF — malware analysis report

Static analysis result for SHA-256 196863a17bfdda07…

MALICIOUS

PDF

87.1 KB Created: 2021-09-10 04:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b2b963f453885e56c1b0a8ca099795f5 SHA-1: 4e830531acdb2cfac608c869a4b41ee2dfe7f4b8 SHA-256: 196863a17bfdda0778e9e04da8b25b6e0dff6ed4071c633fcb1edf483537b973
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs, many of which are unknown or lead to PDF files, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to lead users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://rovitek.com/userfiles/file/turofepav.pdf In PDF document text
    • http://discus-rus.ru/upl/file/18543546777.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/vuximizurolebubi.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/86448695260.pdfIn PDF document text
    • http://kd-council.com/upfile/files/45943640891.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/ranevomarurixudezeb.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/nanonadak.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/24287990107.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/wubovama.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/pujejasusoro.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/62457738509.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/42114978766.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/78218237273.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/56725869525.pdfIn PDF document text
    • https://sunpower.lv/ckfinder/userfiles/files/1705254363.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210902014642.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f40d98691c---15027903630.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/77970424521.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/firosepezalozizumelux.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/felajuwamijawerabasat.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/44875364532.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613178a68422f---70098585883.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/sokolupizisuwu.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/gaxifogasozoxilu.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/58387347312.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=flix+twt+premium+apk+downloadPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE312 10744 bytes
SHA-256: cfdcc03ef9cfce9e0c28873075114e609e9289e098be5f7fc6f738e595d5c1eb
font_01_sfnt_off0000fbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D3 22888 bytes
SHA-256: 37d61946e2c6a116958af225acd1479660cd0164ea9d00712179595ded8769e6