Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc1fffc9b41ee56e…

MALICIOUS

PDF

174.7 KB Created: 2021-02-25 10:29:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 3a3dc0f775cb6d49b2648ca5d785b30f SHA-1: 1b0e3f59a9f8285f679e7f51d705338395d7ac3f SHA-256: bc1fffc9b41ee56eb49926fff041014f6c80e7747d0ba0c18bc1e8ec1530b1eb
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, indicating an attempt to lead the user to a malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware delivery attempt, likely using embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/wix?keyword=recollections+of+pembroke+elementary+school In PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/wUigs8W/nukuragudufotekejuvegi.pdfIn PDF document text
    • https://wugovaxovagebi.weebly.com/uploads/1/3/0/9/130969592/4193306.pdfIn PDF document text
    • https://foduzivanikatik.weebly.com/uploads/1/3/4/4/134492938/15164795078dd5.pdfIn PDF document text
    • https://cdn.sqhk.co/bixatavafut/hchcShh/40701786886.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/iKkgdje/xajafimalinokobobovinab.pdfIn PDF document text
    • https://cdn.sqhk.co/wugotiparo/tcadjcg/vertigo_movie_poster_artist.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/Bkugfgg/nixud.pdfIn PDF document text
    • https://cdn.sqhk.co/faroziwe/euRiigj/80936034670.pdfIn PDF document text
    • https://sowekunozo.weebly.com/uploads/1/3/5/3/135321923/panewafes_pekoxapobitel.pdfIn PDF document text
    • https://cdn.sqhk.co/semejegofip/hjhdggr/highest_in_the_room_apple_music.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/hiicjcT/sidaladifuwupanomud.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/hhqYzcO/goal_goal_and_over_2._5_prediction_tips.pdfIn PDF document text
    • http://btsworld.org/real_car_parking_2_driving_school_mod_apkz7yx8.pdfIn PDF document text
    • http://leree4.club/unblocked_games_76_drift_car_simulatoryjjcz.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/wupagivoz/9785751664.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/39846269066.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/fuzijigu.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/designated_survivor_series_1_episode_guide.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_off00027690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27690 5568 bytes
SHA-256: 48724ba294387549e4406ea702637c6ddb4fc080761d895d3ef8ad3cda67d6ce
font_01_sfnt_off00028965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28965 10240 bytes
SHA-256: 850b5ce8fb0a6adc6eca9f113ac086c3a11bf87bb969072cf605f8b71a9216e8

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