Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b38415b7bfce64…

MALICIOUS

PDF

90.6 KB Created: 2021-07-06 03:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 33cc42ed8250404736d854b97e97651d SHA-1: e44f568654dec8a2787b93ab2d8d21154ac4868d SHA-256: 12b38415b7bfce649b7676b86c644f14e68afe6814a45c6be530ca226d38cbd4
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of external URIs and embedded URLs suggests the document is designed to redirect users to potentially harmful content or initiate downloads. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://philabc.ru/uplcv?utm_term=power+efficiency+guide+free+download
    • https://cafepiolho.com/uploads/assets/61153739535.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b363d3342---sararovuzivero.pdf
    • http://tele-video.ru/upload/files/derefexoj.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd96e7e184---60565236564.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/17244642309.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/be030aa9d5939b90748aaf97b0edc6e0/39236468909.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160822290ae58a---xedumebumalogoliwupinawok.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2172cce660---41778374697.pdf
    • https://bmw-zona.ru/uploads/file/sovalos.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/6cceee8e6e4bcba5459e4277f6942b75/71588648519.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608533146abab---88183810030.pdf
    • http://jshtextile.com/UserFiles/file///niwupudufogutigegik.pdf
    • http://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/6264390444.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160817e3f2e359---79630447299.pdf
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/c67e56a5694dcc22d7f363dba2373ff8/18763967126.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80d6c7d551---denogejutajagovazaripojiz.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2dcc622b5---62077958025.pdf
    • http://didocrosby.com/imagenes/file/23785726914.pdf
    • http://www.smartlandgroup.com//ckfinder/userfiles/files/81429266794.pdf
    • https://vivekanandbawwa.com/userfiles/file/niwededogoxaluk.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ece1c889e---xinewinuvom.pdf
    • http://onishi-kyosendo.jp/archive/35292902469.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/27b434509564ce38fa2bbca8a8bd6325/welekuzopilavodaruxo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010030.bin
fe88479c0fb273163eb23d1a0a989af554492c880833967e798d1c2f57b04a2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 10684 bytes
font_01_sfnt_off000118a4.bin
782c6ed876ebb035ffcb69b28d00b299941b793f8032c4d1190e470d68cbfe82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118A4 17108 bytes
font_02_sfnt_off00014551.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14551 16792 bytes

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