Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e977a7e6bedfbe2…

MALICIOUS

PDF

69.7 KB Created: 2021-03-25 03:53:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3e757c2e3e860390285a32bd93c72749 SHA-1: c6bfa596a68c94874c69fe7b3646800e4ffb7a05 SHA-256: 6e977a7e6bedfbe2e587fddfacf6201e2775d729aefe343ac404257f988f95d6
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 0.9998

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://botokaw.ru/strik?utm_term=junior+business+analyst+salary+in+us PDF link annotation
    • https://cdn.sqhk.co/nodujugebi/LBiaggi/4691374285.pdfIn PDF document text
    • http://tinesemexogo.mygamesonline.org/lobed.pdfIn PDF document text
    • http://gifozuxozud.22web.org/julixazofisimokidi.pdfIn PDF document text
    • https://cdn.sqhk.co/kiwametin/ijYjdjf/children_s_story_slick_rick_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/Qjiklq9/mineral_oil_laxative_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/hdlcPig/dibisatinigi.pdfIn PDF document text
    • http://lakenamazaga.iblogger.org/wetus.pdfIn PDF document text
    • https://cdn.sqhk.co/purorelaz/Xhejjjf/snow_slopes_milton_keynes.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/tijurekokajoxetovuvowi.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/dxeheia/butajixad.pdfIn PDF document text
    • https://cdn.sqhk.co/jevikepuja/hjifhbR/bhagavad_gita_full_in_telugu.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/zozofufulolig/eulerian_path_bioinformatics.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/formation_of_carboxylic_acids_chemguide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5679c745-c03e-4fd1-ba02-47d104f6edb0/lose_yourself_eminem_songtext_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/petsafe_shock_collar_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/xekuxinupotutipoluw.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/hx_stomp_preset_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d47664f-3aeb-4a3a-b7d8-aa07af6259ce/38980920389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc1742e-5cb6-4621-8caf-e3dbc067ece3/zolupodajiruzujisaluj.pdfIn PDF document text
    • http://xodupope.epizy.com/vefinako.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_off0000d1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FB 4912 bytes
SHA-256: 300ec5b24f02b9f495b304f95ad062a191981c255323aed8c9995337e4698957
font_01_sfnt_off0000e2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C2 11420 bytes
SHA-256: 959329f065e7c0018c1aaaf9edf0b626502497bcf8ead627395f56dcae36c2c9

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