Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d95f9b1a4bba852…

MALICIOUS

PDF

71.6 KB Created: 2021-02-14 22:59:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: de394dc3697ed4104653d2d5a5a33c32 SHA-1: c4f8fcef5b93414e31feb435b1228bfcffdb5711 SHA-256: 1d95f9b1a4bba8520324fe6704715e41aea0a75bbec33de9cdfa6654e40c0b17
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with one prominent URL pointing to a link farm on disposable hosting. The document body, though heavily obfuscated, suggests a lure related to a 'homemade lava lamp experiment conclusion', likely a pretext to direct users to malicious content.

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://baarspo.ru/wix?keyword=homemade+lava+lamp+experiment+conclusion PDF link annotation
    • https://cdn.sqhk.co/vugomupuzisa/wjgddFj/survival_rate_of_pancreatic_cancer_stage_1.pdfIn PDF document text
    • https://cdn.sqhk.co/nilulugaj/YeifidT/matrixyl_synthe_6_serum_review.pdfIn PDF document text
    • https://cdn.sqhk.co/zelagagunogo/gikfgfG/car_making_games_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/6HqpEgj/cinema_tycoon_2_mod_apk.pdfIn PDF document text
    • http://goguduve.iblogger.org/great_customer_service_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/eghjbjb/zawukefamefemazujoxorejik.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/pgipphf/fruit_bunny_mania.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/jj4iiKZ/flower_bed_metal_edging.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/KjeiaBr/dusefupadatowi.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/whdHusS/49785204035.pdfIn PDF document text
    • http://goduvide.22web.org/27183938080.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/gjzjdXv/30099949043.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sipariwemarisu.rf.gd/16640463256.pdfIn PDF document text
    • http://robebiwasufilu.epizy.com/police_bharti_2019_online_form_date.pdfIn PDF document text
    • http://zowipazivavi.epizy.com/bcbsm_medicare_advantage_provider_manual.pdfIn PDF document text
    • http://guberiwexoza.rf.gd/lutafoxupazedorubovobed.pdfIn PDF document text
    • http://xevivalekivo.epizy.com/rearranging_equations_into_y_mx_b_worksheet.pdfIn PDF document text
    • http://lavuradisaxel.epizy.com/flannelette_flat_sheets_uk.pdfIn PDF document text
    • http://sebilazog.rf.gd/12453779299.pdfIn PDF document text
    • http://tawexega.epizy.com/information_on_actor_audie_murphy.pdfIn PDF document text
    • http://wavedada.epizy.com/zebuzugu.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_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 5308 bytes
SHA-256: 3a8dc0fd93b1b17f0a4b59f39502233996fcda5d86c99b25da68808b5c29356b
font_01_sfnt_off0000ecb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB6 10444 bytes
SHA-256: dbf50c38ad1b5cd2fd1231d58f4efa074b604cd4be1866a7a445bc165d22a503

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