Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b189988999e37b…

MALICIOUS

PDF

72.8 KB Created: 2021-02-26 22:29:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: befaf3ccd88a7fae35a8473de5c09e96 SHA-1: 6111c6a99355eff2aa9ce7cf3fcb80bc763bf84c SHA-256: 16b189988999e37b29fdb820502d0efc6dcdb34f0c0a003c5fcc14b641982fdd
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wb?keyword=a%20court%20of%20mist%20and%20fury%20audiobook%20free%20download PDF link annotation
    • https://cdn.sqhk.co/zufuxirap/4z5WjjA/fall_stardew_valley_best_crops.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_60250c1f7396c.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/higcVhe/5776571561.pdfIn PDF document text
    • https://cdn.sqhk.co/gizibiliwili/XjdghFX/commuter_benefits_lyft_bike.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/5Rhbidf/22935578774.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/gchjXic/xujinogewesitibupesuja.pdfIn PDF document text
    • http://ru-dev.xyz/83517609003z4yum.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/heShjc5/runemirubovumip.pdfIn PDF document text
    • http://grusha.space/pivogaluguvowyfibu.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/djhidjf/beautiful_drawings_easy_to_draw_step_by_step.pdfIn PDF document text
    • http://poverkavoda.website/jovirupc4cq.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/mavixu/funny_questions_and_answers_jokes_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/guided_access_iphone_xs.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/qcy_t7_review_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/lodgepole_blowout_report.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_off0000dfce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCE 5556 bytes
SHA-256: 2592a7dac3ffeaf05f208ea62b1d3aa1db8c4c84d539b7e91847f316855cc81e
font_01_sfnt_off0000f2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B6 10380 bytes
SHA-256: 0fb1a38c2eaff872470cb6862822ae774f822434ab24a3baac0ee60cf84b7079