Malicious PDF — malware analysis report

Static analysis result for SHA-256 65178a9ecd8eb93b…

MALICIOUS

PDF

77.4 KB Created: 2021-03-15 07:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1dbe67c69f0abd96f7a8d970758cc169 SHA-1: b1272be0afc592b0e84cbf09ab7408700bb16480 SHA-256: 65178a9ecd8eb93bf58d6efbde1ccc67f50289d8f42bd435f45b7acd1ee970d9
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 numerous external links, with a significant number pointing to disposable hosting and potentially malicious domains like xezojetit.ru. Heuristics indicate a link farm designed for SEO manipulation or to distribute further content. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest an attempt to redirect users to malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 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://xezojetit.ru/wix?keyword=lg+v20+themes+apk PDF link annotation
    • http://hhizmet.com/5879585301z3onb.pdfIn PDF document text
    • http://reduslim-italy.site/what_do_green_vestments_mean_in_the_catholic_churchgnsxp.pdfIn PDF document text
    • http://tublitalia.space/dress_code_policy_for_lecturers_male_and_femaleg4psl.pdfIn PDF document text
    • http://kuwufusef.22web.org/dutogulimavugaw.pdfIn PDF document text
    • http://czecheducation.space/jopavuvogfvm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c45314a1-1762-4780-88bf-e402c55f35fd/12752327642.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/67968492145.pdfIn PDF document text
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_bd637b51044d4ce1ab28f1745452373a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae44259c-cbe1-4c09-b991-42042dbf2888/21731178964.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/67241141181.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/chromosome_number_worksheet_answer_key.pdfIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_141be7437de0447486e530d9b5c0f620.pdf?index=trueIn PDF document text
    • http://pewafup.epizy.com/rimas_y_leyendas_bcquer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf001cc-c8be-4403-af19-fb0fd9f754ec/are_wild_mushrooms_dangerous_for_dogs.pdfIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_9f5217fb3eda4298a163c7a464249e9a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7cd639-2c63-4b80-84fe-012ca26a827f/romantic_novels_to_read_for_free.pdfIn PDF document text
    • http://bajuxatimilema.rf.gd/pulipaxifef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3452b515-6de8-4961-9589-b9c34f18e4ff/rosuraxezuvugiwobepelo.pdfIn PDF document text
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_42efec76e1a0441783bbdf3f352aaf61.pdf?index=trueIn PDF document text
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_ea714ab4c08444229be68793a26848be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/how_to_reference_online_article_in_apa_style.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc2a4a31-58cb-4fc3-a42d-5064d88809fd/how_do_i_activate_my_att_velocity_hotspot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA84 4968 bytes
SHA-256: 4017b244ea9e7f30157a2450af926b567457686490c3658a6f24c4d2c0b3187e
font_01_sfnt_off0000eb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB73 19028 bytes
SHA-256: 46491da00ab72f56f7011739f7a2fc9a42ec025adaec79543b0fd1af47e6f93b
font_02_sfnt_off00011a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A22 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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