Malicious PDF — malware analysis report

Static analysis result for SHA-256 f719d5b50d3ad0e5…

MALICIOUS

PDF

75.2 KB Created: 2021-02-04 19:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 00fe73eb1d26f0c641bc5e6a48dc20c6 SHA-1: 0f8b316260a99cce7fa728dd50edebfc83dbffd3 SHA-256: f719d5b50d3ad0e560cdcd2497b0092c3fe9f3aae4d64db61ebeb2e9afd10a4d
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to various websites, including one that appears to be a search result for 'coliformes en el agua de pozo'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://leonvi.ru/wb?keyword=coliformes%20en%20el%20agua%20de%20pozo PDF link annotation
    • http://evilcheats.fun/gojidawewofov4f6u.pdfIn PDF document text
    • http://girlsbeach.space/wikaxan0lf9m.pdfIn PDF document text
    • http://autoupgrade.website/102720604049j4y4.pdfIn PDF document text
    • https://pokekuxabinupar.weebly.com/uploads/1/3/4/0/134016783/vipujofu_kezibijenubab.pdfIn PDF document text
    • http://gamedv.design/switch_daily_apprva2h.pdfIn PDF document text
    • https://lerofiputa.weebly.com/uploads/1/3/4/3/134367001/2802570.pdfIn PDF document text
    • https://zamivevi.weebly.com/uploads/1/3/1/4/131437513/2169461.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/8797266.pdfIn PDF document text
    • http://proita.space/73662596100n7l91.pdfIn PDF document text
    • https://kofovozeregom.weebly.com/uploads/1/3/4/3/134313602/bokilus-kajutap-zofurox-bikago.pdfIn PDF document text
    • https://zekorawuj.weebly.com/uploads/1/3/4/8/134862422/3696396.pdfIn PDF document text
    • https://zoxalutaj.weebly.com/uploads/1/3/1/4/131407742/rodobul-gitakakowatiw-xazunulido.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/consumer_reports_best_air_fryer_2019.pdfIn PDF document text
    • http://pewejefaxi.rf.gd/free_ant_er_for_google_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/nccn_guidelines_melanoma_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/bofusipu.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/52701115518.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/gudaronugepurapatizoti.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_off0000e6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CB 5316 bytes
SHA-256: 1d8fb0ed8192f5332a60ca6346aa22fb855d29da28511348c1adad4bec8f476a
font_01_sfnt_off0000f8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CD 11556 bytes
SHA-256: ce5d715faa3bf82a701577dd528a54a122728eff2f54112b961375fb3d21227e

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