Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebc4d2552423f63…

MALICIOUS

PDF

81.5 KB Created: 2021-03-03 17:25:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bd7056b228dcde7702ba651a0f8f41b0 SHA-1: 20394dc5c21f8f3bc4a32b8b5d0d30ff7f074c57 SHA-256: 7ebc4d2552423f63ebd5a7cbaf84b891011b80c8e42d959454f73a5f23638496
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains links to known malicious redirector infrastructure, specifically 'https://crophysi.ru/award?keyword=ng-book+the+complete+book+on+angular+7+pdf+download'. Additionally, it hosts a PDF at 'http://shopsupergood.site/80240685499vaeru.pdf', which is part of a link farm on disposable hosting. The presence of a visual download button further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=ng-book+the+complete+book+on+angular+7+pdf+download In PDF document text
    • http://shopsupergood.site/80240685499vaeru.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/54746274149.pdfIn PDF document text
    • http://wazerutumaj.22web.org/warriors_box_set_erin_hunter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497109/normal_5ffc035203940.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/best_one_year_bible_podcast.pdfIn PDF document text
    • http://tersq.fun/mini_dachshund_breeders_washingtonocpin.pdfIn PDF document text
    • http://conicppjry.bid/androgenesis_in_fish8rpzh.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/3102546.pdfIn PDF document text
    • http://alex-chekalev.com/icsh_hormone_full_forml27t9.pdfIn PDF document text
    • https://kowasazupajobex.weebly.com/uploads/1/3/1/3/131383373/budizefesabor.pdfIn PDF document text
    • http://tryne.xyz/bitvise_ssh_server_5._6077ipu.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
    • https://s3.amazonaws.com/jiwotarotavuz/asalem_gurthukuradhu_song_from_anthapuram.pdfIn PDF document text
    • http://naxesabefadufu.atwebpages.com/jet_li_the_monkey_king_full_movie_english.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/where_can_i_buy_proform_treadmills.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_off0000f30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30C 5600 bytes
SHA-256: 4648706ba7e3cbbf83752c49cb2f2dc78163ee6c6b7c7b16f2fd24056249983e
font_01_sfnt_off0001061c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061C 10568 bytes
SHA-256: e5f4a692cad3e406e942df735036087d59d13d48a154523085b14fc2a892fcf2
font_02_sfnt_off00012a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A41 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176