Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f4b9de81102a06…

MALICIOUS

PDF

31.1 KB Created: 2020-05-23 23:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 270ac63225a64fed7107e3589b403a56 SHA-1: 542aec101e5c6a8f91ec5894ccf0232b22a635e2 SHA-256: 89f4b9de81102a06852ee07452e44729993e887bc3da1c802708ea46c50813fe
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or distribute further malware. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a potential distribution or redirection mechanism, possibly leveraging embedded JavaScript within the PDF structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 http://glebl.bpmtc.com/uploads/1/3/0/2/130288818/130288818.html#serial+number+on+otterbox+case PDF link annotation
    • http://intratec.org/uploads/1/3/1/0/131070096/kozafakex_suwupedolub_rinuriwiguvudup.pdfIn PDF document text
    • http://hammeredbyhandpikeplacemarket.com/uploads/1/3/0/2/130287261/zumetawoxidarudi.pdfIn PDF document text
    • http://christelle-levilain-avocat.com/uploads/1/3/1/6/131606537/8542657.pdfIn PDF document text
    • http://paigeparish.com/uploads/1/3/0/5/130588786/zenofafakusuj_sifoj.pdfIn PDF document text
    • http://bakariweddings.com/uploads/1/3/0/7/130740018/4536854.pdfIn PDF document text
    • http://xxpressyourselfteesandmore.com/uploads/1/3/0/7/130740489/dapazuraturefe_nawoxezizu.pdfIn PDF document text
    • http://daseanjonesforjudge.com/uploads/1/3/1/4/131409158/vovizotedobir.pdfIn PDF document text
    • http://mappingandplanning.com/uploads/1/3/1/1/131164075/buluxizixepu-tidaguxed-gamusav-vijopimife.pdfIn PDF document text
    • http://acedrywallks.com/uploads/1/3/1/6/131636774/2010596.pdfIn PDF document text
    • http://eliseimages.com/uploads/1/3/1/4/131454556/dc4ee9918cf5.pdfIn PDF document text
    • http://sabstore4u.net/uploads/1/3/0/5/130541004/sezolit_vukowewu.pdfIn PDF document text
    • http://lionessera.com/uploads/1/3/0/8/130813427/90217864ac.pdfIn PDF document text
    • http://vacationcharitychallenge.com/uploads/1/3/0/7/130775407/3180590.pdfIn PDF document text
    • http://thearlyworm.com/uploads/1/3/0/6/130621995/683446.pdfIn PDF document text
    • http://moongsushi.online/uploads/1/3/1/4/131482933/gulenamugasapa.pdfIn PDF document text
    • http://skd.solutions/uploads/1/3/2/3/132303221/sabolilobef.pdfIn PDF document text
    • http://longevityhealthandwellbeing.com/uploads/1/3/0/9/130969330/1e27a8c695.pdfIn PDF document text
    • http://woodlandtitleut.com/uploads/1/3/0/9/130969016/f610640c398.pdfIn PDF document text
    • http://reeleert.com/uploads/1/3/0/7/130775556/vebumanakis.pdfIn PDF document text
    • http://divafitsportswear.com/uploads/1/3/0/6/130620979/1485564.pdfIn PDF document text
    • http://mitmultiservice.com/uploads/1/3/0/8/130874623/63c5476d.pdfIn PDF document text
    • http://ericdillie.us/uploads/1/3/0/7/130740192/869456dd42c54a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://forums.androidcentral.com/showthread.php?t=985614&s=e7e994a63bea51dae8be6d55bc922f44&p=66967In 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
    • https://forums.androidcentral.com/showthread.php?t=985614&s=e7e994a63bea51dae8be6d55bc922f44&p=66967In 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 7

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50B7 9204 bytes
SHA-256: d71d2aa5c6cf9d37ad4777de1f4c4370ef7c9c9698aa6728c09eb340c3378424

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