Malicious PDF — malware analysis report

Static analysis result for SHA-256 6758eef216a4418f…

MALICIOUS

PDF

77.6 KB Created: 2021-06-12 19:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e62d348adf4042ce2f68e78ae12b9172 SHA-1: 0d6947c9a22d627dcefa8627485f4b1894031e26 SHA-256: 6758eef216a4418f5ee07c3a25aabf143c0251727f815f01b5adab50a84944c8
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://krisoc.ru/pbw?utm_term=album+songs+in+tamil+2020 PDF link annotation
    • https://domalaxugopomi.weebly.com/uploads/1/3/4/6/134606687/kogemunozuduvur.pdfIn PDF document text
    • https://xomivumikeso.weebly.com/uploads/1/3/0/7/130774979/b295b3.pdfIn PDF document text
    • https://sifofazawovetix.weebly.com/uploads/1/3/0/7/130776166/jowazu_tatunixuramabap.pdfIn PDF document text
    • https://kakujaboregoj.weebly.com/uploads/1/3/5/3/135341432/zegobigajof_fewefosu.pdfIn PDF document text
    • https://mojivisosodarez.weebly.com/uploads/1/3/4/0/134096231/norotax.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/pumisezisa.pdfIn PDF document text
    • https://devusabuzanuwuz.weebly.com/uploads/1/3/4/3/134352374/9159408.pdfIn PDF document text
    • https://kamutimasevukov.weebly.com/uploads/1/3/1/8/131856564/7426016.pdfIn PDF document text
    • https://sifelinapekaw.weebly.com/uploads/1/3/1/6/131637019/bixinevirefijir-wudaromo-mebologaxuf.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
    • http://godekazonigi.pbworks.com/w/file/fetch/144458559/nupawisazeniti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c60df10b-e6d6-4fb1-aa6d-07c7628c00b8/cuales_son_los_tipos_de_planes_administrativos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc7d3e09-e9e7-4e0b-a58f-cc16715f74ce/31504730932.pdfIn PDF document text
    • http://zewalar.pbworks.com/f/56702368329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65930132-f593-4cda-99f6-e6d794345fbb/xodipofevizosasewuluvu.pdfIn PDF document text
    • http://ruwomodanom.pbworks.com/f/stoichiometry_mole-mass_mass-mole_problems_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c06fd9-4e46-4855-94c8-8fba51387d4d/lofiwiloxixe.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144417888/lofisifijed.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_off0000e522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE522 5076 bytes
SHA-256: 2adb254114aba5337a8cb1a9427a00016d864e2f1d343c805e6a866222eb3f40
font_01_sfnt_off0000f642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF642 10964 bytes
SHA-256: 1ee86130646801e82ccf7db3b24644cb610ce90a004c7a00bd63eb2463e27600
font_02_sfnt_off00011b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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