Malicious PDF — malware analysis report

Static analysis result for SHA-256 b86363b59751f9fb…

MALICIOUS

PDF

76.7 KB Created: 2021-03-21 10:13:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f1e7cb3dadfb7fb475feb3f253db1c2f SHA-1: 8eb0f63ddf26ac7c494b2358bb8e12b967092484 SHA-256: b86363b59751f9fb7d47cc2a6e3098d85ab0289d21360f18295ba340f04548b1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/strik?utm_term=how+to+take+apart+a+frigidaire+washer PDF link annotation
    • https://sepuvomaxobaba.weebly.com/uploads/1/3/5/3/135311468/9227431.pdfIn PDF document text
    • http://shoop-fo.ru/viah_song_jass_manak_ringtone_djpunjabk6am1.pdfIn PDF document text
    • http://fodokimi.22web.org/java_programming_app.pdfIn PDF document text
    • http://dmgameplan.com/john_j_murphy_intermarket_technical_analysis9hclx.pdfIn PDF document text
    • http://lelofewadu.iblogger.org/43119129214.pdfIn PDF document text
    • https://lunejuwibamir.weebly.com/uploads/1/3/4/5/134587588/e37b5.pdfIn PDF document text
    • http://golden-bridge.pro/the_metabolism_plan_lyn_genet_free_download11g2w.pdfIn PDF document text
    • http://francobusiness.com/solar_power_bank_26800_mahbnfbw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://birifamabaxum.rf.gd/traxxas_t_maxx_3.3_review.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/android_one_update_policy.pdfIn PDF document text
    • http://ribitotuv.epizy.com/beguremanogo.pdfIn PDF document text
    • http://wojodiguf.rf.gd/xulenefomujunuxaw.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_c1dbbfd11b1d4235b9d347c1bacfe9bf.pdf?index=trueIn PDF document text
    • http://poluxik.epizy.com/23228446677.pdfIn PDF document text
    • http://punegejofuj.epizy.com/reading_comprehension_worksheets_for_10th_graders.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/bromure_de_cyanogne_formule.pdfIn PDF document text
    • http://xolisijepe.rf.gd/aoe_2_cheats.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/96475104102.pdfIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_e29910cdd54d491ca6f344ea4adf758c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/kufez.pdfIn PDF document text
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_a69153d0708245a7ab8f66a74418f3c8.pdf?index=trueIn PDF document text
    • http://nujivoforegiv.rf.gd/44012045276.pdfIn PDF document text
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_3f56b9b06ac34fcf8bf606a6d15bce09.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lulelepese/printable_worksheets_for_adults_bible_study.pdfIn PDF document text
    • http://kemetosope.epizy.com/lagomedipag.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_off0000ee19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE19 5388 bytes
SHA-256: 81d11224b3a678e6157645442a8c60fd4c8d3844c3338a04c9024b5071427c17
font_01_sfnt_off00010080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10080 10776 bytes
SHA-256: 155da616afa310bf3582e823fc235f1a5edab00eceb39cfe7606ccdd68c8aa7b

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