Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a5e7e77072eb6b…

MALICIOUS

PDF

68.3 KB Created: 2021-01-04 21:03:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 85d202fda29681d3f9f1ef3d91244744 SHA-1: 2d0cfd56b583116d31bc81a468be7ba2499ff54a SHA-256: 27a5e7e77072eb6ba15a23debfe17a6d7101a7ecc6d9686e3a81801858b3d4af
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. The primary malicious URL identified is 'https://ggtraff.ru/aws?utm_term=congruent+angles+proof+worksheet', which likely serves as a gateway to further malicious content. The presence of numerous links suggests an attempt to direct users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=congruent+angles+proof+worksheet In PDF document text
    • https://cdn.sqhk.co/ruvajuvewuj/iaiaSDq/rally_championship_game_pc.pdfIn PDF document text
    • https://namutaborizelo.weebly.com/uploads/1/3/4/7/134766338/67404b8ca5246f.pdfIn PDF document text
    • https://zogelamugem.weebly.com/uploads/1/3/0/7/130775951/zemetewoni.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/puwogupumobukolerar.pdfIn PDF document text
    • https://losikopak.weebly.com/uploads/1/3/4/6/134616488/fagufemolovoxupov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/03eca7cf-8f13-4713-b874-6f22364d9f37/lawamilixadiwagodoru.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/ganesh_aarti_bhajan_free.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/video_green_day_holiday_live.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/android_emulator_for_ubuntu_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/8220787729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57025d63-549d-4d9b-98ef-9840666f4e6d/bose_companion_3_multimedia_speaker_system_specifications.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/82970743666.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/59452048377.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/aagadu_movie_video_songs_hd_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/82865260874.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD07 5224 bytes
SHA-256: 03293cf5fe3cbefc19ad3ccb9884b7348c2d813996bbd06c288d211b982b8a57
font_01_sfnt_off0000cedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDC 9384 bytes
SHA-256: 7beb156eb008be5c51d9c8f70883c65a9e525d0732705ff97f7ab1a7f1d54b85
font_02_sfnt_off0000ef2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2A 16072 bytes
SHA-256: 062f8a7185608a18dbd56baf48eb14c791e3c6ea8866a2ddd6a03467109098f1

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