Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7097564c9c7048…

MALICIOUS

PDF

81.9 KB Created: 2021-09-20 20:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6a9fb0505095a8c407e26bcd12f90089 SHA-1: 28744110e688dcd9f6ccc932d62a211ebee5e0ad SHA-256: fc7097564c9c70488fecb5a65e211587e56bf6dfa3e897429b21752d2487b5b1
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The PDF contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malicious redirection attempt. The 'SE_CALLBACK_LURE' heuristic further indicates a phishing context, likely aiming to trick users into calling a fraudulent number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://coretry.ru/uplcv?utm_term=mp3+juice+mp4+download PDF link annotation
    • http://dmhu.eu/uploads/uplib/file/tonugekorunipi.pdfIn PDF document text
    • https://la-klamm.org/Files/files/vetagejanotulalusavuxa.pdfIn PDF document text
    • http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/zuzeteda.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/gozukigekikamadakipixubu.pdfIn PDF document text
    • http://domplus.su/userfiles/files/57159347914.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/m3nv575kiv0l9epmk1ll17jrv2/88364823132.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/76637358336.pdfIn PDF document text
    • http://fitviewer.de/files/file/xivodojosototibowazumu.pdfIn PDF document text
    • https://portalkucharski.pl/app/webroot/media/files/49713749171.pdfIn PDF document text
    • https://alpinashop.bg/files/18496436189.pdfIn PDF document text
    • http://runbo.net/upfiles/files/16305204179090.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/mivometilibakupejaw.pdfIn PDF document text
    • https://renault-service.com/userfiles/vutovixixajuwogidekiki.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/sapovokefuwakigazezowa.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/petudaxivamavu.pdfIn PDF document text
    • https://sadex.pl/fck/file/losowojataxem.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/15645498208.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/1573248771.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/guwegujitopexatosu.pdfIn PDF document text
    • http://cssh.es/img/file/62531737940.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/k1qbd2ck1682rlb2di4ichat87/sitovamilekawelelidafal.pdfIn PDF document text
    • http://itagqatar.zajeltel.com/itag/file/files/92614667751.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56835304707.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://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_off0000dbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF403 17352 bytes
SHA-256: 6088ca6dcf8280d69e0474483e0051564eaa76172ac3d92d6d11b893ebf20b81
font_02_sfnt_off000120e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E9 10868 bytes
SHA-256: d25e70e5c533e37876a28e18a4da8147dbf355782434f6b7603b3c89e0421219