Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c9fae00d6e5ffa…

MALICIOUS

PDF

82.7 KB Created: 2021-03-10 12:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6e5db5aff29f39ef81f9d5aeb738b444 SHA-1: 4b9d4a0e20858d9dbfaa17fc53b3400727e23a8d SHA-256: 19c9fae00d6e5ffa179c6d39fc42f2ea11134e6cba3fa2910d20c13eebb5ada6
204 Risk Score

Malware Insights

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

The PDF contains a lure for a game ROM download, which is a common tactic for distributing malware. It also exhibits characteristics of a link farm, with a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier further confirm its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://soxebez.ru/123?utm_term=ben+10+omniverse+2+psp+rom PDF link annotation
    • http://katipef.medianewsonline.com/signs_and_symptoms_of_post_op_complications.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/how_to_get_rid_of_acne_scars_black_skin_naturally.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/EgdDmgg/bobutadotivamebi.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/gfwiegi/episode_choose_your_story_apk_uptodown.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/wezujodesurox.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/love_story_movie_song_mp3.pdfIn PDF document text
    • http://retamos.mygamesonline.org/84616498881.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/xafotopupopufawifadiw.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/zavikimoj.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/dilowalilim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/serogajugomiji/89393101139.pdfIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_abe164b070554fff8982de3da117ba01.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kubafezin/1793390917.pdfIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_af880e2eec6d4dde98969e2826986d73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/pebixitonulatobikagarak.pdfIn PDF document text
    • http://vobozezojip.onlinewebshop.net/organic_nomenclature_practice_problems_with_answers.pdfIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_fff5810a889540d6ba0c1ce2cf56d7c3.pdf?index=trueIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_c0e2a07b91d948d9841aee67a4f88ebf.pdf?index=trueIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_7e1c82e9982d4856b39572f5ef41b459.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/barcode_scanner_google_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/actemra_prescription_information.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE411 4864 bytes
SHA-256: 4e2586a9ca736bd7cce952a2ff72bb6ec1082747dd0c8d1fb6d36afa5f5b225b
font_01_sfnt_off0000f479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF479 10908 bytes
SHA-256: f425e5d1bf363ff12d0e30b73d59a92267c611635d0110f48c74728d5ecdc798
font_02_sfnt_off000119ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EC 16068 bytes
SHA-256: b1615e29a4fe6c7320d553a30418b4fece26933a192be804fa4a6c1955e67a67
font_03_sfnt_off00012e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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