Malicious PDF — malware analysis report

Static analysis result for SHA-256 547c332dae5cb2e7…

MALICIOUS

PDF

77.4 KB Created: 2021-06-05 21:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3e4fc82bee69d6e0934ec495f7c9e993 SHA-1: 046981ed67b7940e995576ae4878ce1309d0f8db SHA-256: 547c332dae5cb2e72bb9d7c757cae4805c3f30085220cdba7ea7ee1264184d87
186 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One prominent URL is https://ponafet.ru/123?utm_term=wpf+treeview+hierarchicaldatatemplate+header, which is likely the primary destination for the malicious activity. No scripts were extracted, but the PDF structure and heuristics strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/123?utm_term=wpf+treeview+hierarchicaldatatemplate+header PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489409/normal_5fc7ff15d3fab.pdfIn PDF document text
    • https://lopolovugafi.weebly.com/uploads/1/3/4/1/134109017/wamofojexope.pdfIn PDF document text
    • https://pugofadunenem.weebly.com/uploads/1/3/4/7/134727284/tuvezimagenexed_diwenuzoxerar_bewipogijazade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452161/normal_6041b444e268d.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4444655/normal_60b13dd74d98a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446030/normal_6040fbb18c5d1.pdfIn PDF document text
    • https://mezuxanivatanid.weebly.com/uploads/1/3/4/4/134499991/ginupupusazozow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474470/normal_6059c11e51e2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491157/normal_60544bfc0c165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482188/normal_606d3a48da0c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444117/normal_603e59e8e98d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489264/normal_5fe7bce6e49fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454043/normal_603cf880320b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laxaxufudej.pbworks.com/w/file/fetch/144526521/bianca_nieves_y_los_7_toritos_chapter_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ce242f-9d26-4a28-a893-20776e27cc9d/8583617337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92391813-bdb2-4083-a4b3-9c51312335db/how_to_read_the_bible_in_the_correct_order.pdfIn PDF document text
    • http://zepupifob.pbworks.com/w/file/fetch/144426027/jeppesen_private_pilot_maneuvers_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30acd57-62b5-4468-ad63-691b136a986d/67955557797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15205d1a-21fb-4cfc-a025-250f8f50e95b/digetodobizezaxifepevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeec6879-d984-4ef5-ac69-888a9bba8c78/wiwajupodadafikapelibimig.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144433473/cuanto_es_en_pulgadas_un_metro.pdfIn PDF document text
    • http://tasonupopam.pbworks.com/w/file/fetch/144504288/36264316916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0f4a1b-443a-40b7-9613-2668032bb92e/rafabopit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c275198-1d06-43e7-97de-33d5bf7ab603/kibajizurugewelobumijoso.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_off0000e31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31B 5380 bytes
SHA-256: 55c5c09aa91ef57c9d23cfde11ab9e9f94ae951b6f76875d01320ea977432e3f
font_01_sfnt_off0000f55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55C 15316 bytes
SHA-256: dd8ad6f832b2a48aa1039d214c6b13bba9a84966f7e915b89d4dcca501b9370f

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