Malicious PDF — malware analysis report

Static analysis result for SHA-256 298e7aa40c951283…

MALICIOUS

PDF

82.1 KB Created: 2021-04-07 11:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d8dc173f3960300744a9c77a8ef8a42c SHA-1: 97ca0de542ca073e03ea3efdde8f827587ec7268 SHA-256: 298e7aa40c95128384fff1d7e6cb4068bf9cf439cbfdf3db2ab66daf6299c3ec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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://crophysi.ru/strik?utm_term=new+seeds+of+contemplation+chapter+summary PDF link annotation
    • http://italysummer.fun/whitfield_advantage_ii_pellet_stove_troubleshootingw6g40.pdfIn PDF document text
    • http://jesawukimefix.mypressonline.com/bubusezivujorexuzanatiwuz.pdfIn PDF document text
    • http://worldhold.online/suxawufelikvhef.pdfIn PDF document text
    • http://copyright-security-ig.com/85310922703by9id.pdfIn PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/komazojizozulokowefawe.pdfIn PDF document text
    • http://barashik.space/sweat_characters_lynn_nottage5115z.pdfIn PDF document text
    • http://micrometer25bill.site/strategic_marketing_plan_powerpoint_template2rnyy.pdfIn PDF document text
    • http://blancer.xyz/bring_into_existence_crossword_answersiu8r5.pdfIn PDF document text
    • http://kipegujodup.getenjoyment.net/d_d_tomb_of_annihilation_free.pdfIn PDF document text
    • http://moitender.org/48783163183e6pvy.pdfIn PDF document text
    • http://mazafaka69pussy.online/when_do_i_get_my_1099_from_social_securityupcfr.pdfIn PDF document text
    • http://serviceforyou.site/how_to_evaluate_an_essay_examplee7ynz.pdfIn PDF document text
    • http://vknart.xyz/zutisalokobikukj3fy.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/vizuminasus0btv7.pdfIn PDF document text
    • http://zokiwedilar.mypressonline.com/21441608074.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8e303d0-f350-43d2-b7c3-f886ef13ec25.filesusr.com/ugd/1bb397_cf5abfc3ea134bff9695b56a3e248600.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65469ccd-a196-40f9-8cd3-ae5100e11f9f/does_weber_warranty_cover_rust.pdfIn PDF document text
    • http://nunavaxukozu.onlinewebshop.net/little_fugue_in_g_minor_organ.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a24a3acc-9d1e-414b-a26e-ee1ce6f11cd3/what_is_circuit_design_verification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929d58e5-d429-492a-a86b-cb3ce2dbfe01/focusrite_scarlett_18i20_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff5bc827-539f-4581-8dcf-d57301b2a08b/68997197958.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_73b84cd29ac9400d987e542e48c90882.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a81a52fb-9870-45f9-83f9-6d08416f6e32/20147812324.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_off0000fe55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE55 5560 bytes
SHA-256: 21f039156d135224bc2d4cdb57a4184cbfb58ed3927eb4bc0ad2f3f32e7b7fad
font_01_sfnt_off00011134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11134 12384 bytes
SHA-256: 75becf410b48c28497c02b1a4321358519805504a7bc7cf7383198c148324518

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