Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aaa19b14b065fd9…

MALICIOUS

PDF

70.0 KB Created: 2021-09-25 06:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c1f9cd080296caf743f32f7498639166 SHA-1: d4afeb9e410affd096a87737c96c2212b4b0ba01 SHA-256: 1aaa19b14b065fd98c7b9776e0c852bc843d5e548f0d9e39970354c9200f3246
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to potentially compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The heuristic 'SE_CALLBACK_LURE' indicates the document may be attempting to trick users into calling a fraudulent support number, a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wastran.ru/uplcv?utm_term=anime+tagalog+dub+app PDF link annotation
    • http://alltimescare.com/attachment/files/wokosesiba.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/29848457630.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/61166932722.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/37328883224.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/tazapoladabe.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/46812872314.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/55431169937.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/5655039817ce39b6e8acdee03036467f/nasexet.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/tuxufebevede.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/gepaxu.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/34543242017.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16141d339b9055---23183236923.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/tiwevedexiwol.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/nuxajo.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/56456095274.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/werijezolifusijoti.pdfIn PDF document text
    • http://excitechem.com/userfiles/file/latarox.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/votivifaredenubamap.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/tobitanobepazatufidej.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/17575243756.pdfIn PDF document text
    • http://4yoga.by/pics/files/nokizuzev.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16143dded7f234---zasad.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_off0000af7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC791 10688 bytes
SHA-256: 404aa799c328658839377959c34a6e417342de7f009cc40b7f1caf4c7aa301c5
font_02_sfnt_off0000df95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF95 16888 bytes
SHA-256: 0f2982c1afdc9e68422b9a19e1efb8ab42736dd012fc9c97253b8b72ff2ef662

Open this report in the interactive analyzer, or submit your own file for analysis.