Malicious PDF — malware analysis report

Static analysis result for SHA-256 352851970b5225fd…

MALICIOUS

PDF

82.7 KB Created: 2021-03-20 04:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b53ec96949e987ccb7ab2b3388a08044 SHA-1: 8067eba4e370df8be547372b571974c10986e664 SHA-256: 352851970b5225fd13c649af218f98bfa8e8fb80b8e5da3b85604dfc7c668c7f
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The heuristic analysis revealed a PDF link farm containing numerous external links, with one prominent URL pointing to a potential phishing or malware distribution site. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content, possibly for phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=do+you+lose+weight+with+juice+plus+capsules
    • https://rusipamisu.weebly.com/uploads/1/3/4/0/134017355/wemugifalas.pdf
    • http://afracheat5.xyz/daniel_hart_power_electronics_chapter_2_solutionsqxm5x.pdf
    • https://cdn.sqhk.co/jagibuvat/hcjj7vl/digodivurajax.pdf
    • http://nanebaxexob.getenjoyment.net/81900976022.pdf
    • https://sizikipumaxa.weebly.com/uploads/1/3/0/7/130739349/3909833.pdf
    • https://cdn.sqhk.co/fukonovum/e0ggR8J/retro_arcade_bar_okc.pdf
    • https://cdn.sqhk.co/novitovikor/jeBxGhe/dexurujufavam.pdf
    • http://apelsins.space/48437994647e0167.pdf
    • https://ninozaji.weebly.com/uploads/1/3/4/6/134690112/lulupo.pdf
    • https://cdn.sqhk.co/pifonode/icF6ijv/70785978333.pdf
    • https://cdn.sqhk.co/tixukiko/Uhfjhgc/37685933501.pdf
    • https://mimedotaxejibi.weebly.com/uploads/1/3/0/8/130873786/2345532.pdf
    • https://bagesasadav.weebly.com/uploads/1/3/4/3/134383367/4632147.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jisunopesaluzi.atwebpages.com/manusia_sebagai_khalifah_di_bumi.pdf
    • http://fabevax.myartsonline.com/cfa_level_1_curriculum_2020_download.pdf
    • https://uploads.strikinglycdn.com/files/8f4e6747-9919-4b03-a7f0-d4ba6f066575/washington_dc_weather_doppler.pdf
    • https://uploads.strikinglycdn.com/files/c464f7ee-57fd-4c5f-9da1-dc1c9a88cf9c/gedixekazes.pdf
    • https://uploads.strikinglycdn.com/files/f03b6555-ad9d-4c29-9d38-d0619a9c49d8/susafaletovaratopanada.pdf
    • http://judiserod.onlinewebshop.net/que_es_un_antipiretico.pdf
    • https://uploads.strikinglycdn.com/files/3b18c608-8051-4fe5-b9d4-1bdedd2a7dc0/6.0_powerstroke_oil_specifications.pdf
    • https://uploads.strikinglycdn.com/files/675abb16-43f6-48c5-922f-0bc9e620c4d6/93123281546.pdf
    • https://uploads.strikinglycdn.com/files/9e653615-15e6-433b-ac98-e924f4a515cc/bosch_axxis_dryer_manual_wta4410us.pdf
    • http://malejubu.myartsonline.com/what_happened_at_the_end_of_the_story_the_veldt.pdf
    • https://uploads.strikinglycdn.com/files/2abb1706-3c66-4ae0-a593-b513a5c1415e/ophelia_dahl_married.pdf
    • https://uploads.strikinglycdn.com/files/643c2fdc-c361-4380-8a24-c2df2d9a4382/how_to_figure_out_what_size_furnace_filter_i_need.pdf
    • https://uploads.strikinglycdn.com/files/5aadbb1a-1954-4a2d-b635-92bcc2e18f3c/what_does_rational_religion_mean_in_education.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103a1.bin
7bf7256354ed916b5f3a3499295c7730fc8858d2825fa3480aacc6b8440f4d9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103A1 5368 bytes
font_01_sfnt_off00011611.bin
f7af42ea2917f9a9971230fb838695ebba40717fbe17eaa3eae7c160d7a005db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11611 11540 bytes

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