Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a90635e7f0ab5c…

MALICIOUS

PDF

72.5 KB Created: 2021-02-14 19:25:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ebad1fdfc3b8aab151de8834df9f2daf SHA-1: f3e0f99267813febeafe254c0c5859d9efc74ef0 SHA-256: 75a90635e7f0ab5c6a4f383971e408562ff2b27271e223dcfaeee523a04f08ba
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=accu+chek+compact+plus+owner%2527s+manual In PDF document text
    • https://cdn.sqhk.co/xobupiba/jgfhfge/penalty_shootout_game_world_cup_2010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457279/normal_5ff28b9a40a6c.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/f3RiaSZ/kibijulun.pdfIn PDF document text
    • http://alcozerox.com/79499956092m1qwj.pdfIn PDF document text
    • http://kigowamukidiba.iblogger.org/sontag_regarding_the_pain_of_others.pdfIn PDF document text
    • http://reawolt.online/anime_girl_pose_3d_apk_megazp9e3.pdfIn PDF document text
    • http://remontnatali.ru/1st_grade_fluency_passagesl328n.pdfIn PDF document text
    • http://interbankdigital.com/putesekumepipejegafagavcrd24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nepafex.epizy.com/veregilerulonetojox.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/giwujorolobizuvakedu.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/zitagotavironademisater.pdfIn PDF document text
    • http://raxusitusumulag.rf.gd/oecd_transfer_pricing_guidelines_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/guy_blinking_meme_format.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/application_form_for_minor_passport.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/traffic_reporter_global_news_bc.pdfIn PDF document text
    • http://zadizufosa.rf.gd/2005_apush_dbq_form_b_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/all_autobots_in_transformers_1.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/comic_sans_font_ttf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEB 5184 bytes
SHA-256: bdd96332c862c0c980f7f8085a2339236f9d2b622d9f3817e963f0d86cf981e8
font_01_sfnt_off0000e17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 10828 bytes
SHA-256: 09cd34962a3200f6e0dc55d8d2e50cb3bdccb4ba23c439b50f039dffea91165f
font_02_sfnt_off00010649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10649 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176