Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69d3a8dc4f0a695…

MALICIOUS

PDF

78.7 KB Created: 2021-03-23 06:04:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 89ce8444f55108fe5d27435323d88582 SHA-1: 5cb3c909480bb7f8aafadfd855a407289562122b SHA-256: e69d3a8dc4f0a69553da44377f099d84babe8597fd7e45c73d993e15d3af416e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized to appear as legitimate search results for technical documents. The primary URL, 'https://druttle.ru/award?keyword=design+patterns+interview+questions+and+answers+for+experienced+pdf', suggests a lure to a site that likely hosts malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://druttle.ru/award?keyword=design+patterns+interview+questions+and+answers+for+experienced+pdf PDF link annotation
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/fojevifejowa.pdfIn PDF document text
    • https://ripapexogona.weebly.com/uploads/1/3/0/8/130874469/vubolujazigutax.pdfIn PDF document text
    • https://wunabigoji.weebly.com/uploads/1/3/4/8/134891590/4328612.pdfIn PDF document text
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/budodoleta_wagisusebojenor_bikobumon.pdfIn PDF document text
    • https://wonulabanasilod.weebly.com/uploads/1/3/1/4/131482851/9701210.pdfIn PDF document text
    • https://tasimaxexakopox.weebly.com/uploads/1/3/2/6/132681882/supakutenarusawem.pdfIn PDF document text
    • https://bisijonowazupu.weebly.com/uploads/1/3/2/6/132682684/9170281.pdfIn PDF document text
    • https://xutevuper.weebly.com/uploads/1/3/0/9/130969179/samoruvozoforil-wikejafujakiku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_1e5b8c779d5a4eb8b592915069957355.pdf?index=trueIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_95555815745045308253a7684bfcac8f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/acute_tubular_necrosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/207c02b9-4cbc-4eb7-84d5-795e825241ce/14805406819.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/gagunasunilelubasoxe.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_5758f78e4c2e45f8980d1c07c94f6d63.pdf?index=trueIn PDF document text
    • https://37e79482-e567-4eff-b449-6ea9b90d4679.filesusr.com/ugd/cff0cd_8f6cb9cf56a84d41a6085fb8aebde91a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/editable_flyer_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/151255d6-2fbf-48be-92bf-597a58ab2858/lajonogatudamo.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/renogajoxuga.pdfIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_2b6a59639e254172b6b58e6bab7ce2c4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/890bf2a6-4823-4f4a-bfd9-cc3bd99d7716/will_sat_test_be_cancelled.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/16668339379.pdfIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_52ebd9153e4c4dfab2d0fbf8180238af.pdf?index=trueIn 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_off0000f6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C0 5636 bytes
SHA-256: 6552793dbd9010692db1cd5392609dddc7f35415994433c01adee929e894eea1
font_01_sfnt_off00010a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1A 10536 bytes
SHA-256: 4ed50cf7990efdff84e56ddeafbace93b420d4b4b7ee0215afc15d2e88cf8664

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