Malicious PDF — malware analysis report

Static analysis result for SHA-256 374cac42180ef5c0…

MALICIOUS

PDF

68.5 KB Created: 2021-05-10 22:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03989b17a599079b6b28cf5e22181257 SHA-1: d57d4ce0ea6c513780dd338e0c912ee00cc2bcc2 SHA-256: 374cac42180ef5c033d1ca9a931a1c4511db4808a123644d255053a02a54067e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dafemum.ru/wb?keyword=manual%20craftsman%20garage%20door%20opener In PDF document text
    • https://cdn.sqhk.co/purawewus/yjhhdzr/polutipejilexufewabisosa.pdfIn PDF document text
    • http://laguduzimunek.22web.org/cape_town_city_map.pdfIn PDF document text
    • https://bobixazila.weebly.com/uploads/1/3/4/5/134599816/4f513f497d.pdfIn PDF document text
    • http://vikolumubibo.scienceontheweb.net/learn_english_speaking_for_beginners.pdfIn PDF document text
    • http://padlamadla.site/wallpaper_engine_tutorialdoi6b.pdfIn PDF document text
    • https://nojasiputijaze.weebly.com/uploads/1/3/4/8/134869787/4490767.pdfIn PDF document text
    • http://datab.vip/jimelibanubomiput07m5.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/yamaha_portable_grand_dgx-505_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/8idhezv/minecraft_pocket_edition_game_no_download.pdfIn PDF document text
    • http://lolibixavug.22web.org/vifimematir.pdfIn PDF document text
    • https://wusitezuredov.weebly.com/uploads/1/3/5/3/135314125/nenaruzij_sunolaxofepuzo_dozolobixegikul.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/1liuif7/sandwich_ideas_for_dinner_party.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/lBU6ieF/ninja_kitty_online_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lakugarim.rf.gd/53831898562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/273894cc-5dd0-41d8-9f00-ce307579695a/are_second_hand_diesel_cars_worth_buying.pdfIn PDF document text
    • http://gomojopovin.rf.gd/87331008020.pdfIn PDF document text
    • http://zezofakarol.myartsonline.com/acta_constitutiva_de_una_sociedad_cooperativa_formato.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/tijekuvobutobitov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5390f6d-aa8e-42d7-af88-11482d12cbfb/58093085823.pdfIn PDF document text
    • http://rasufami.rf.gd/34497317655.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_off0000ce2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2A 5480 bytes
SHA-256: a1ba8b34f15c946a1f3d5948d1e2012579c99a78205f885c13cd331a288a6e89
font_01_sfnt_off0000e0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C6 10052 bytes
SHA-256: 702d24d7db0919bef6065ec30bd390ccf061e5484a89f1fd7fc4a8c8c4d57cc7

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