Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd9439457778c8b…

MALICIOUS

PDF

78.0 KB Created: 2021-03-15 07:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: dd8d8a8739e720e0250bd7759d1a0666 SHA-1: 4363ca45fa660e86df16b97969ef5dfcc69999ec SHA-256: 3bd9439457778c8b534ceb4eb4bf321a0e57daf9f3d60bbe6ac9b6436e2c59ad
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to a 'Dubai mall map'. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest a phishing attempt to redirect users to malicious content.

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 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://xajibur.ru/award?keyword=dubai+mall+map+of+shops+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379964/normal_604cf0c5b78f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5fe1886aaa7c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_604b02c61b18f.pdfIn PDF document text
    • http://wuxijuvusif.22web.org/20542630304.pdfIn PDF document text
    • https://cdn.sqhk.co/jobebakegip/dUiEhhK/road_rage_epic_shooting_florida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458628/normal_6042d1ad3f23e.pdfIn PDF document text
    • http://sojuvofud.22web.org/assam_tribune_today_news_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/5mfhi7P/86785830007.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447464/normal_6004da83963a7.pdfIn PDF document text
    • http://mevazuzazoxip.22web.org/water_carbon_nitrogen_cycle_worksheet.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/julexekubaj/12841760191.pdfIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_3b1bf0e50df44674ad1c163f2600dae7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/85795032293.pdfIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_748fe27fa0664230b8ad807bb8752c19.pdf?index=trueIn PDF document text
    • http://jowuwivipi.rf.gd/short_story_ideas_with_a_twist.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/bedingte_formatierung_excel_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/xerodebevow.pdfIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_c7a03ea9a05744a1aac77ae4444941d0.pdf?index=trueIn PDF document text
    • http://zumewozuzetarun.epizy.com/dageselokavefasoxomub.pdfIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_a43beaf7847c490cb65dc24a17d3ef13.pdf?index=trueIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_2b737333f6c24b4c8f1007adfa0129e7.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_off0000f22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22B 5324 bytes
SHA-256: b7bfc60d7524ad5d00b95e58a25537dd15641d278e020872729b9c24ab63dda3
font_01_sfnt_off00010425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10425 10768 bytes
SHA-256: 9074b1254182c5eb03ede2993242b50dadaf0f188ff1e9519d4a722537786343

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