Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c811ff46a99850f…

MALICIOUS

PDF

112.1 KB Created: 2021-03-24 10:48:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3a106ca2a47dcae4dc391f864ae4c1a1 SHA-1: 7182b0cd533b8e049b97570383daae41a8e6f9d2 SHA-256: 2c811ff46a99850fd3c6b6f8c0c6bf544e7a2da6450d5ee37989ece077fd8056
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing-related PDF. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or redirection scheme. The presence of embedded URLs and the PDF's structure indicate an attempt to direct users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=ballaststoffe+tabelle+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418000/normal_603141d6a40b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379377/normal_60451f5e30011.pdfIn PDF document text
    • https://xidokuwu.weebly.com/uploads/1/3/1/4/131453793/2668079.pdfIn PDF document text
    • https://figalinob.weebly.com/uploads/1/3/1/8/131871825/4023705.pdfIn PDF document text
    • http://pixalowedu.22web.org/how_to_calculate_average_weight.pdfIn PDF document text
    • http://pelinebaj.mypressonline.com/aprendizaje_activo_en_preescolar.pdfIn PDF document text
    • https://telabafulux.weebly.com/uploads/1/3/0/9/130969700/zebekinodapu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500674/normal_5fe5c0abbcf01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415051/normal_5fed3dc25a1c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_600c7fa015c5e.pdfIn PDF document text
    • https://tetalopen.weebly.com/uploads/1/3/1/8/131857308/takipezojovuki.pdfIn PDF document text
    • http://daburus.iblogger.org/nidiborasisasidi.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/2672091691.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d4b25cd-065c-4116-b3d8-9646f07724b0/pajuzowuwikugowos.pdfIn PDF document text
    • http://tulezij.rf.gd/dirapopapopalozidug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/283be483-4619-41df-ae06-002a15bc16c6/47986500515.pdfIn PDF document text
    • http://zogoxuf.atwebpages.com/walmart_tv_trays_set_of_4.pdfIn PDF document text
    • http://juwiwigepumer.rf.gd/15261526420.pdfIn PDF document text
    • http://puloxivomavari.epizy.com/tifesovijejedulobenimes.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_off00017b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B4D 5128 bytes
SHA-256: 0e2d3d06c9af891f08497b275e644b6fe363717bfc987353d333c3125658539d
font_01_sfnt_off00018cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CC9 11320 bytes
SHA-256: 4c96327a0e15e9308fe5caf26fa4dd6e675e1532b802b10f6b999da4bcf4cfef

Open this report in the interactive analyzer, or submit your own file for analysis.