Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8395a8f6a69b2c4…

MALICIOUS

PDF

75.3 KB Created: 2021-01-21 11:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 251d6a75b78be0fc2027adbbc0ae3bf2 SHA-1: 8dd902da023aac0c52750a43bff87518ae773c00 SHA-256: d8395a8f6a69b2c46002023c44ce51d7d9bf6ab482c90fc804f96bf65e94107f
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 a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'Iphone full hd 1080p wallpapers'. The ML classifier and ClamAV detection strongly support the malicious verdict. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/aws?utm_term=iphone+full+hd+1080p+wallpapers In PDF document text
    • https://site-1174461.mozfiles.com/files/1174461/jataw.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/Yqx43sA/xofekidojem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470688/normal_600719f7b2e78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467950/normal_5fad23442ba76.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/9Pifhir/nv_zorgverzekering_umc_telefoonnummer.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/uBjaoie/bmx_bike_track_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489237/normal_5ff424e759d7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425235/normal_5fec830d19cbd.pdfIn PDF document text
    • https://cdn.sqhk.co/lexujowina/egi4HMj/nidusadanumuzikikemilaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411493/normal_5fe313c692f8a.pdfIn PDF document text
    • https://site-1221616.mozfiles.com/files/1221616/call_of_duty_modern_warfare_season_6_maps.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/povodijirig/xezopelowibazob.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/dbt_dear_man_give_fast_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/beduvud.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/to_do_in_japanese_te_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/61532689823.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/97490112184.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/captain_america_workout_routine.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/chick_corea_spain_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/61103643195.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_off0000e821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE821 5548 bytes
SHA-256: 5c62b23fda7800f44f839176adebfdee44b2623779827e568e01696939dbbe1e
font_01_sfnt_off0000fb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB14 10760 bytes
SHA-256: b2a2da94edc5f4d79b7b17ea69faa67e6f69b9df1cb7018749ad9d45022d790c

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