Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7d77a7176510c2…

MALICIOUS

PDF

108.8 KB Created: 2021-05-25 09:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1cb4fded24895b615c38ea9092f30aac SHA-1: 5d503f1ea3015ac2654672c8088978d31f3cba61 SHA-256: 7c7d77a7176510c239556c63909ea74f2f5dc144a07e47c90c3b863d7da055e6
136 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an external URI and an image lure that redirects to a suspicious URL, likely for phishing purposes. Although no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it's designed to trick users into visiting a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/strik?utm_term=how+many+dinosaurs+are+still+alive+now PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370077/normal_601badce3051f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_6063c56227ea6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_604665b01edbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419441/normal_5fe0b00455f3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376358/normal_5fc8ee4a5a598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506200/normal_60445fbe4e150.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/luxelula/71613618451.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/70660287928.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/99675303569.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/nifufelavitozilakid.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/adam_clarke_bible_commentary.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/libro_el_secreto_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/fractions_to_percents_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/xiviwixogokiguvo.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/tatiana_manaois_all_the_time_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/29061210362.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/tovanoxupuzaregovegef.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/companies_closed_due_to_covid_19_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/what_is_the_role_of_knowledge_management_systems_in_business.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD7 6416 bytes
SHA-256: 528d1e79c27aec131c2cbf846536b85f4c117e3725d0fa982f5a85159cdab222
font_01_sfnt_off00012fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA9 5184 bytes
SHA-256: 66951d36d5eb3e0a800ac09f02d6e897d6c7b75e3b25f6082fe76048b25622dc
font_02_sfnt_off00014142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14142 9876 bytes
SHA-256: 2ec2ae3e8a6b712ac1804c0072e633e5b29a624ec5c2945213020f9a41cabe0a
font_03_sfnt_off00016120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16120 11252 bytes
SHA-256: baad3ce08574d3da62c831f6dd76fd03cfcaa5076dd7017c962f2c8a0ae16bb4
font_04_sfnt_off00018770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18770 16256 bytes
SHA-256: 8cc6bcc2cf3defe0a88aedbd81e1c3d6ddceaf294630c8a268e5b6d92b2eedfb
font_05_sfnt_off00019ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CCD 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df