Malicious PDF — malware analysis report

Static analysis result for SHA-256 7962987a6676af91…

MALICIOUS

PDF

76.7 KB Created: 2021-02-22 09:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 967ac9d8341df6a60995a6d5b11621e7 SHA-1: d9da29b3644ee141ce3f64ebcbedd141f33d7f86 SHA-256: 7962987a6676af9135f8e94952804ff94bb925b50952b0882161ea18b8fe7487
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with text related to writing restaurant reviews. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://yafferge.ru/123?utm_term=how+to+write+a+restaurant+review+on+yelp In PDF document text
    • https://cdn.sqhk.co/wujakegu/mZWm7ge/23653820536.pdfIn PDF document text
    • https://cdn.sqhk.co/kobadaxo/iiS78G9/iss_hd_earth_viewing_experiment_live_stream.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/hcOqvja/kong_arcade_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/hbhf1Qr/97252188026.pdfIn PDF document text
    • http://businessoutsourcing.org/how_to_program_my_craftsman_garage_door_opener_remote3pag2.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/bgh8icH/pikmi_pops_surprise_jumbo_dog_plush.pdfIn PDF document text
    • http://static-start.top/injury_on_duty_report_form6b92i.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/5geKxih/oxygen_poweramp_v3_skin_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/Hghnjam/airplane_mode_movie_logan_paul_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/iQPFE0m/zombicide_board_game_for_sale.pdfIn PDF document text
    • http://lollipopa.online/42448599898d2hff.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/rijhihd/zombie_shooter_2.pdfIn PDF document text
    • http://febisulel.22web.org/wifimefozepadam.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/ffOpaV5/64754681032.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/7ibVije/84428864572.pdfIn PDF document text
    • https://cdn.sqhk.co/konarolikomu/iaqjgQU/photo_to_video_maker_best_app_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/the_hollywood_reporter_media_kit.pdfIn PDF document text
    • http://rakulewozagax.rf.gd/31169216752.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/infinity_pool_design_guidelines.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 5028 bytes
SHA-256: 24e08331d561f9c2482c148cb34f6ac80fe30bb836ea57c9dc1be881295eb7ca
font_01_sfnt_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 10772 bytes
SHA-256: 729999cb73596a71a56768f0b0609aebacc19900dd525107b39eff94def930f4

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