Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd65c859e581a23…

MALICIOUS

PDF

67.5 KB Created: 2021-03-30 03:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 68981a55f7fd9fc7f525ef3ea7418c91 SHA-1: 1f760534838b6e86ba4a9560e98a377d0013efb2 SHA-256: 7dd65c859e581a23e7eb0b44daa0cc8364ec2c1a676d55441002a9a140bc04cc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://baarspo.ru/award?keyword=biology+a+level+aqa+pdf PDF link annotation
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/mamunexovejes.pdfIn PDF document text
    • https://cdn.sqhk.co/nimabugokofa/DA4jfWS/homeostasis_and_transport_worksheet_answers.pdfIn PDF document text
    • http://copalofa.site/slope_of_a_line_graph_worksheetgbvju.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/gdrqeih/price_of_copper_wire_per_pound_in_california.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/jagfjgc/my_airtel_tv_recharge_offer.pdfIn PDF document text
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/disiwid.pdfIn PDF document text
    • http://dorightpress.com/42096523488lbs8g.pdfIn PDF document text
    • http://good-production16.site/garmin_s10_vs_bushnell_neo_ionujrop.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/8fb16920-fe51-4489-9018-8d5a4a90aedf/fases_del_proceso_de_investigacion_cualitativa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c8eac5-ab34-448a-98cf-6c6c73071d0a/6082329327.pdfIn PDF document text
    • http://pudusibojekajip.rf.gd/laterite_soil_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/fopekadogulizu.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/15661924554.pdfIn PDF document text
    • http://nitarerot.epizy.com/70861489134.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/will_there_be_a_series_of_unfortunate_events_4.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/72508513131.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_off0000c9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E3 5272 bytes
SHA-256: d40faf6dce01e775d0a423863a0c18ed5af727c9d43cd520fc3b4a5393878164
font_01_sfnt_off0000dbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 10560 bytes
SHA-256: 38ca84f51e5dfffe6207489f991e58e6aa871b511948b33ce4d6b8f8c25d4e01

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