Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4cb68b65919ca31…

MALICIOUS

PDF

104.3 KB Created: 2021-03-14 08:57:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 926c16b79103fac5f58dfdd8fe3b75e3 SHA-1: ba99650fde5e05ee6245aa86d569474d69819eeb SHA-256: d4cb68b65919ca318b3ec66aea02bb6ce881ef9ef9be1bfcc92115ad38c7e5cd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to drive traffic. The primary malicious URL identified is https://seumenha.ru/award?keyword=arjuna+award+winners+list+pdf, which is likely part of a phishing or spam campaign. While no scripts were explicitly extracted, the PDF structure and extensive link farm suggest it's used for traffic redirection, potentially leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://seumenha.ru/award?keyword=arjuna+award+winners+list+pdf PDF link annotation
    • http://sale50.pro/batexokagikugozefurirusom7mu5.pdfIn PDF document text
    • http://fitnesspack.net/688289445525m0q0.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d04bb81-accc-4599-84bf-85a52a1f2450/54593528869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3951c66c-9be5-4fd4-99b9-014d666569e1/lotesan.pdfIn PDF document text
    • http://fokugogubegu.rf.gd/best_survival_kit_for_backpacking.pdfIn PDF document text
    • https://7722bba5-72ad-4d15-a72d-9ce9fbdcf1b5.filesusr.com/ugd/772ad5_2c196ea6bd794e6fa1f7f30853e4fd0e.pdf?index=trueIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_9bb562e5396b4aa886fcb50698eed105.pdf?index=trueIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_adb0e050cb2641aa9f60b2d24f946f5e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9697ae93-549e-4b17-8eba-a9c4a6c2f4e9/52205324974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f5baad3-9674-4171-8ad5-d3e7ae3f0abd/67427161355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f2c3237-7d2c-44bb-8bc3-cdc08a6b8f1f/sitoganaxokid.pdfIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_e93f35248aa04b66adf6c7f3d29e1e19.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ae5248-18eb-49dc-b3c8-e869b14061c3/92504280071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e123562b-408b-45dd-bcbd-a6f2c638114f/besajaber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26dbad67-62fe-4c69-9c18-27fa821856ee/d-link_dir-655_firmware_dd-wrt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c17bdd-a02d-42c4-a75a-69575165c1a5/rigutojitudakav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d8a0754-06e6-4aef-afdb-a75fd98ad521/gramatica_inglesa_completa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a15f9c1c-34eb-47a6-a06b-b1619a9adcf7/10168403471.pdfIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_042ca5a9f2ce48c980cf6a4e5ea84414.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c49a91-e194-477c-b53a-98562be2875b/muvirozorug.pdfIn PDF document text
    • http://sawadosifavaza.rf.gd/miss_peregrines_home_for_peculiar_book_synopsis.pdfIn PDF document text
    • http://kulekedeziwab.epizy.com/what_do_you_need_to_get_a_mississippi_drivers_permit_in_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf60ade-fedc-4b69-85cc-aaf299f4e685/how_to_pray_in_the_courts_of_heaven.pdfIn PDF document text
    • http://sivojosifa.epizy.com/surovifizoladizasani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a8edae-32d5-4dc9-9ea2-f8eeee4e6ec6/pharmacotherapy_handbook_10th_edition_free_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016198.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16198 16328 bytes
SHA-256: 9ae85c89d7c77e24eb848319e839611777e40fe8e6c7b8d698c08cabde670c1c
font_00_sfnt_off0001134f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134F 5192 bytes
SHA-256: 69a8d63466f0d58a6a3a1b780ae90710a274ec4da68deee51c222299418135bb
font_01_sfnt_off0001251d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251D 11336 bytes
SHA-256: 5d44f375fe7035568e28bd579b553dac28017428d02738ee644e2830612503f3
font_02_sfnt_off00014c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C42 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

Open this report in the interactive analyzer, or submit your own file for analysis.