Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38d19555255490c…

MALICIOUS

PDF

104.9 KB Created: 2021-02-20 03:28:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2849f9f54693f917260c8085b4f4d3f9 SHA-1: dd22c17068a50641ab130c7dcd1050dd14f8ee34 SHA-256: e38d19555255490c418da2443de0fc7639602d5861a2b300005d6afdf70fdfda
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to technical queries, likely a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://baarspo.ru/123?utm_term=where+is+the+reset+button+on+bryant+furnace PDF link annotation
    • http://g2am2e.xyz/8965263074958jox.pdfIn PDF document text
    • https://jepexilopenokaf.weebly.com/uploads/1/3/2/6/132680937/bawen.pdfIn PDF document text
    • http://circleshtang.xyz/fenar5sb4m.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/2180171.pdfIn PDF document text
    • https://cdn.sqhk.co/jupuvonijor/bwjjeji/sopivuvazogazib.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/gjiUXja/gun_master_2_unlimited_money_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xedaberetaj/hgjjCUm/koponed.pdfIn PDF document text
    • https://vanufutalolu.weebly.com/uploads/1/3/1/1/131164160/jagawugukasezi.pdfIn PDF document text
    • https://jifafaxima.weebly.com/uploads/1/3/1/8/131871415/xuresuzugifefar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_6014143613a2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486552/normal_601bb9b06c427.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486743/normal_5ff01d3c62148.pdfIn PDF document text
    • https://wovufimi.weebly.com/uploads/1/3/5/3/135327312/a17603a3cbf.pdfIn PDF document text
    • https://cdn.sqhk.co/zusegekum/jiRggic/92286741567.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nafabumawo.rf.gd/64303725725.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/deditexive.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/nitefixipikalowexur.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/66716110350.pdfIn PDF document text
    • http://runatavakez.epizy.com/factual_report_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/multi_intelligence_theory_howard_gardner.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_off00014eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EB1 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off000158f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158F4 5192 bytes
SHA-256: 89c957b916385e29653197491448ba4af218a2bfa9d465985131a16ca3a7e9d7
font_02_sfnt_off00016ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AB3 12036 bytes
SHA-256: 59a84d7a22fb59b1688e5410923b68c7042590c25f5253a5c485c4d605720742

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