Malicious PDF — malware analysis report

Static analysis result for SHA-256 1344030494391059…

MALICIOUS

PDF

77.4 KB Created: 2021-06-10 11:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c530890e7f0b7ec649dd8a9f21cdcf9a SHA-1: 69070784576c0dafd0fa94658b6cafdc68ddbebe SHA-256: 1344030494391059e18b7e318d22067682202433ac0151413fd36acf6dfc5b4f
194 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/pbw?utm_term=mxq+pro+4k+android+tv+box+firmware+download PDF link annotation
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/vusovubiwikedej_molix.pdfIn PDF document text
    • https://xegezutiraviral.weebly.com/uploads/1/3/0/7/130775125/madewavajizi-fuvobi.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/xagoluribitol.pdfIn PDF document text
    • https://kitogabizog.weebly.com/uploads/1/3/6/0/136053612/tavusobajofabaxe.pdfIn PDF document text
    • https://gomigara.weebly.com/uploads/1/3/4/7/134727279/3da16c7a.pdfIn PDF document text
    • https://vuteduwezo.weebly.com/uploads/1/3/4/3/134336695/jawonotidepi.pdfIn PDF document text
    • https://dexatasudawuge.weebly.com/uploads/1/3/4/4/134477966/giriwobolejomo-fubesumazasavop.pdfIn PDF document text
    • https://jarivilil.weebly.com/uploads/1/3/4/0/134012847/986371215c0.pdfIn PDF document text
    • https://tazokadenu.weebly.com/uploads/1/3/2/6/132695553/7909241.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://vowujepojez.pbworks.com/f/gakusen_toshi_asterisk_light_novel_volume_15.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/f/xaxunezipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/255629f8-2fd8-4fd0-a2e1-93ce978745a9/60010681990.pdfIn PDF document text
    • http://tarogifere.pbworks.com/f/34545488161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6684b82-48ca-44bd-81ab-87d737fc99f1/59226981385.pdfIn PDF document text
    • http://zupelapowi.pbworks.com/w/file/fetch/144630636/charles_seite_hochberg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d3c401-8ff2-4095-9a71-7382348899e3/jevezarugibuzorope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466eb499-7bc4-4e1f-9267-ec377cb1bbd6/patabiwasoxituli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6260f18c-4cfb-430d-821c-e70a3b27cc16/55800087013.pdfIn PDF document text
    • http://nikekuva.pbworks.com/f/dell_latitude_5590_i5_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f67a5904-77b0-4e63-bc4d-6c1bd55cad3b/text_features_3rd_grade_worksheet.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_off0000e034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE034 5440 bytes
SHA-256: fa58d29000763087c86fc0646e090f4e0fbde2aeebe0dec338ab5df416d66385
font_01_sfnt_off0000f2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B7 11536 bytes
SHA-256: b634419c0dbd8fdeb74e19ae65481c972d2d10c958c4284ef9e6fb910d76353f
font_02_sfnt_off000119e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e