Malicious PDF — malware analysis report

Static analysis result for SHA-256 7947db47a57a0011…

MALICIOUS

PDF

84.5 KB Created: 2021-09-15 17:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cca3b08c9bf2aa3e9ab9a06d7a1782c3 SHA-1: ec9a459700ffe3c590b632fecac03a822f46830d SHA-256: 7947db47a57a0011f31206c179420f606b28ccc9bf150fa2e03d613afec4867e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links to disposable hosting sites, flagged by heuristics as a link farm and identified by ML classifiers and ClamAV as malicious. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in callback phishing and tech-support scams. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://crewmak.ru/uplcv?utm_term=how+to+hack+facebook+account+with+android+phone PDF link annotation
    • https://altonika.pro/files/fck/file/tofowobozeluxomatozaxome.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dilaxonajozorawok.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/kibarozogapari.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/mavifun.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/98636551506.pdfIn PDF document text
    • http://epmachine.ru/d/files/16733043624.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/51497397931.pdfIn PDF document text
    • http://bienbao.net/uploads/files/fulizajomibakunerume.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/161335922d0f7a---36706569413.pdfIn PDF document text
    • http://efrex.cz/files/file/fowidof.pdfIn PDF document text
    • https://ikansambel.com/contents/files/bejuxupevubekeluxevere.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/kejoxifedim.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/42046442757.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/44724218944.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/gasojaralaguxu.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-09-10/1bfd0eda07a9558d0ccbe66e921b316d.pdfIn PDF document text
    • http://hooleihomes.com/cms_images/file/7077918558.pdfIn PDF document text
    • https://franchisebusinessadvisors.franchisebrokerwebsites.com/broker-site/files/files/61013967998.pdfIn PDF document text
    • http://rc-modeller.se/images/file///45208333053.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/87542745020.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/70405972755.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/75941118428.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16135d668077d3---navex.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/5993307830.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_off0000e06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06A 19476 bytes
SHA-256: 5406ed20391f50eaf79f16164d1cdb528f03334cea26f15f9ef9ce276702350a
font_01_sfnt_off00011336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11336 10912 bytes
SHA-256: f9d5a5e70d4dbfed8a6ed78bcfda79a469d3cf7b2dd175eeb87e0044a60b41b7
font_02_sfnt_off00012c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1