Malicious PDF — malware analysis report

Static analysis result for SHA-256 050b7cd01715e801…

MALICIOUS

PDF

78.5 KB Created: 2021-03-29 15:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e1c47f3f9c1e19323e00e2afe6d3125c SHA-1: 55b99b5bf13d1ec00356c563eaa177e204c801a0 SHA-256: 050b7cd01715e80125f96154b0c1ad786f9bcc06437c11f9c2f3de75c2200649
126 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. It contains numerous external URLs, many hosted on disposable domains or link farms, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains metadata related to PDF creation tools, which is likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/strik?utm_term=pdf+architect+4 PDF link annotation
    • https://juwulonureli.weebly.com/uploads/1/3/2/8/132815178/8864128.pdfIn PDF document text
    • https://nuvomananakoleg.weebly.com/uploads/1/3/1/4/131453817/jomojovosezunox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503533/normal_602be92117a7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fe8f12e60af1.pdfIn PDF document text
    • https://sufafiderek.weebly.com/uploads/1/3/0/8/130814754/9816772.pdfIn PDF document text
    • http://nezatarofarix.getenjoyment.net/60463554603.pdfIn PDF document text
    • https://cdn.sqhk.co/votiwixuduzo/U1jgdjh/amana_washer_user_manual.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/genero_literario_de_la_obra_el_caballero_dela_armadura_oxidada.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/68137437169.pdfIn PDF document text
    • http://mopobixufiveve.22web.org/xitugetirimuj.pdfIn PDF document text
    • https://cdn.sqhk.co/belebudetub/dijdjgf/47926993352.pdfIn PDF document text
    • https://cdn.sqhk.co/jataviwimog/sAidIfi/subadopatibod.pdfIn PDF document text
    • https://cdn.sqhk.co/lebapivi/BZNkifv/robalojuwurogori.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/denifabedamadapusoriruvuv.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/cidBiei/fapoxifejov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367914/normal_6000cb3244a23.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/linear_algebra_with_applications_ninth_edition_solutions.pdfIn PDF document text
    • https://lebotowim.weebly.com/uploads/1/3/1/4/131438344/kesodaxe.pdfIn PDF document text
    • https://femesavez.weebly.com/uploads/1/3/1/3/131383434/luvamafulalul-mafuroror-duros.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425726/normal_60272205cee3f.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/77568821965.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://paluluw.epizy.com/zibulasukoribikik.pdfIn PDF document text
    • http://fizuxobitunoge.epizy.com/clasificacion_de_canales_ionicos.pdfIn PDF document text
    • http://matogojetize.rf.gd/wurobarapimabamip.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_off0000ebdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDC 4560 bytes
SHA-256: 4dafc1736bb0103738f33d4e1767c63027fb991d8d9cb91edda5f7ba8466eba2
font_01_sfnt_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 10316 bytes
SHA-256: ea6b90d0dd6af2db7ca2fc48cbebf5002770e31ee7cd1b39c95f4554e0fea60c
font_02_sfnt_off00011ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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