Malicious PDF — malware analysis report

Static analysis result for SHA-256 82749e86f9061539…

MALICIOUS

PDF

80.8 KB Created: 2021-03-22 21:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b9dd5dfab767dfaeaeccfe0754d95a8d SHA-1: 99aeb90e56b2b72179d4a5ac48ae46f9595f7729 SHA-256: 82749e86f9061539c8536e3724ac57dc9642fe4cfb8ab112fa969631da75a5f8
126 Risk Score

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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=how+can+i+learn+how+computers+work PDF link annotation
    • http://poroda.site/kuwaxasusibatijoripx750c.pdfIn PDF document text
    • http://bachanalytics.com/12991998319krnzs.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/sasimusavi_bazaparek_gurodudujumi.pdfIn PDF document text
    • http://barbanapoli.moscow/was_the_bear_in_the_revenant_realt6p5n.pdfIn PDF document text
    • http://magawiwove.22web.org/vemubovijadatituvenos.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/67706788415.pdfIn PDF document text
    • http://logvoz.ru/bejoxokuniip7l6.pdfIn PDF document text
    • https://piwirajaluz.weebly.com/uploads/1/3/5/3/135312697/7ac00a04f.pdfIn PDF document text
    • http://pevisokis.iblogger.org/zitazelusepes.pdfIn PDF document text
    • http://zitugaxusi.mygamesonline.org/budgeting_for_beginners.pdfIn PDF document text
    • http://furniture21.online/11162502995d8e74.pdfIn PDF document text
    • https://bogezemobazuv.weebly.com/uploads/1/3/1/8/131856224/gumodoparalur_rigagoxig_difolusemuw.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/timogiwajabox_petufirejimefe.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/convert_large_cdr_file_to.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/wipotegadodorek/tefiwenedajesebof.pdfIn PDF document text
    • http://xemunebo.atwebpages.com/bokotefukonesipokaviv.pdfIn PDF document text
    • http://wetulokavavute.epizy.com/tire_flipping_weight_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/56413223365.pdfIn PDF document text
    • http://tewegaza.epizy.com/lelepape.pdfIn PDF document text
    • http://nisuzadusidu.epizy.com/newesexobi.pdfIn PDF document text
    • http://kelopemajidimux.epizy.com/zoxiwomorexazo.pdfIn PDF document text
    • http://kugukokoner.myartsonline.com/are_magic_bullet_dishwasher_safe.pdfIn PDF document text
    • http://nonavijewiw.epizy.com/html_color_code_in_rgb_format.pdfIn PDF document text
    • http://dixitexajujus.epizy.com/4723540733.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/80760902891.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001006e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006E 5292 bytes
SHA-256: d432b4a1dd6257a95161d9cfa4a795b6a01ddf19809fc1d324eb464ab839f510
font_01_sfnt_off0001124a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124A 10188 bytes
SHA-256: 67a7509d0faef1d126912abe319750aa01cae998942b50a42efa5d4cfc841704

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