Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf9434532db6bda…

MALICIOUS

PDF

86.2 KB Created: 2021-09-12 06:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: be987f0da4ba1631101b33e61912e7e1 SHA-1: a9fe23334f4dc61b421f80b88500314c9675ed59 SHA-256: baf9434532db6bda2e230d5fccee774be8bcea1b57d40c9023facc14d0c2f685
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous URLs, some pointing to raw IP addresses, which are indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. The presence of 'cmd.com/data/files/' in the document text suggests an attempt to execute commands.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=dragon+ball+legends+apk+mod+2.8+0 PDF link annotation
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc55e152d4---pokewusifavo.pdfIn PDF document text
    • http://sklenicky-obchod.cz/web/admin/fckeditor/userfiles/file/vovuzasesipememaxifused.pdfIn PDF document text
    • https://dawnraytech.985.tw/data/file/userfiles/files/96955659307.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379cc083436---ginarobugigapuri.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/58860914077.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/62638282377.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/73474062631.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/simaxa.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/zugumebavafevofijagewavev.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/4516335762.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/48920694236.pdfIn PDF document text
    • http://qdcmd.com/data/files/zatokuforajenutelofinukan.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613836992ff4b---9340766420.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/lavolapozosadajofub.pdfIn PDF document text
    • http://datcat.vn/2018/file/sesodel.pdfIn PDF document text
    • https://happyjourney.webtrails.in/ckfinder/userfiles/files/91911192962.pdfIn PDF document text
    • http://eltdb.com/UserFiles/files/ribazurizuwiselotigod.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/1072458811.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/64722792487.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/rozujukolazu.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/batafeze.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/17288219387.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee274da3cd---59542022794.pdfPDF link annotation
    • http://karpatskiles.ru/store/file/kemomosujo.pdfIn PDF document text
    • http://dichvuhangngay.vn/uploads/image/files/xoguvadamulatosoluroduvu.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_off0000dfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAB 21768 bytes
SHA-256: 93a7a6df1d9f2996ac2bb6dcd2a39c42b8d08c5b256afbdc19a5a56536c35d21
font_01_sfnt_off0001192a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192A 11296 bytes
SHA-256: e103a5a108f1b6c2fd794d0602c2179996e6f9bf56975c4d117aae3ff75cc217
font_02_sfnt_off0001334d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1