Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7628c05f75debf4…

MALICIOUS

PDF

74.9 KB Created: 2021-03-05 16:15:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c4d53f956773a370f2fee183355be626 SHA-1: 40f93371f78e9fb3ecc9c5d9b660adb942f1d4ff SHA-256: e7628c05f75debf4ca5d377c1b8ff0086b0e1041d5de74279d533c82ea373471
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged as a link farm, suggesting an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=a+midsummer+night%2527s+dream+study+guide+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493578/normal_603930a845d64.pdfIn PDF document text
    • http://glasshookahcatering.com/dubai_tour_guide_update89109.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376606/normal_5fec27f88a4b2.pdfIn PDF document text
    • http://ketotreno.buzz/cuisinart_prep_11_food_processor_manual2xjha.pdfIn PDF document text
    • http://lorenbayi.com/nudoptruq6.pdfIn PDF document text
    • http://naturfresh.fun/sasekatojederovijibuhwhuc.pdfIn PDF document text
    • http://scrlt.xyz/tetinujru5kf.pdfIn PDF document text
    • http://rubeatyshop.xyz/kujara9yakv.pdfIn PDF document text
    • http://heartcenteredequestrian.com/jokiwfq8zk.pdfIn PDF document text
    • http://shtancircul.site/momimekukoqubp4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_600a0cfc63681.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5ffdd49d623a6.pdfIn PDF document text
    • http://pemarozelim.iblogger.org/45216617352.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafoxipebivama.rf.gd/stealth_cam_p12_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60efd0d9-938a-48e3-b455-9e016124682b/arifureta_light_novel_volume_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c1ff00b-f607-4a5b-ba4c-681c62274fc1/55690361662.pdfIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_f4abdda6dbb946b1a9ea7d747bc17764.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dea44de9-0886-42c8-b435-dbea4fb46ca1/fopem.pdfIn PDF document text
    • https://01477de9-116b-42a6-a62c-54244336611e.filesusr.com/ugd/dea9e9_bc09af78c0354a9b8aa244555e7c30e8.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_3cf1013c9e374149a8a4e50a5f973733.pdf?index=trueIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_ed3edb06a39d4422b2885c4bfbbd99c6.pdf?index=trueIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_c3b761d78aea43f087d1fa2616228114.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_off0000e9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A1 5424 bytes
SHA-256: 6d86f6ceb0ce8fb34c2d4a1b76e4e92498960dd42fec21e7ac889b67393890e9
font_01_sfnt_off0000fbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFF 10036 bytes
SHA-256: f7abdc67cf4f395065f1bf7bfbbf5b2f20367fd5d93d69fb457b9eb80249e88a

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