Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e53c050070238a…

MALICIOUS

PDF

75.2 KB Created: 2021-03-08 16:49:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 81f964d722950fb3664617d598ee66a2 SHA-1: 93558b9c31031b8a201fde6f496e43fc3daeac18 SHA-256: 14e53c050070238aae8b49fe9a4ffc67ec329deac9977c5b7aa1fa121f222b5f
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru' which is likely part of a phishing or malware distribution campaign. The PDF structure and embedded content suggest it's designed to trick users into visiting these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=how+to+make+shredder+lubricant+sheets PDF link annotation
    • http://fufirewavit.getenjoyment.net/96318212034.pdfIn PDF document text
    • http://indir-kazan.com/74642142136a3da.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/Pghzjbw/diy_ideas_for_home_organization.pdfIn PDF document text
    • http://rimka.xyz/drugs_society_and_human_behavior_17th_edition_quizlet_chapter_1wkq1w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_60412a14decfc.pdfIn PDF document text
    • https://cdn.sqhk.co/wewotiwalote/hgif9Hb/69880593427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452861/normal_5fd99304439d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_6039fe8f56415.pdfIn PDF document text
    • https://cdn.sqhk.co/purorelaz/jhKIjc6/asana_yoga_hoboken_nj.pdfIn PDF document text
    • https://cdn.sqhk.co/wasulevilid/FJribxD/nixumijisakofebul.pdfIn PDF document text
    • http://jigapenufi.medianewsonline.com/how_to_detect_sleep_apnea_in_babies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_601cf1685f441.pdfIn PDF document text
    • http://hookup666.site/e_coli_infection_treatment_in_catstp42q.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/56443163732.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/asus_rt-ac68u-firmware.trx_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_ac79a3ad2e5e4d0493ba639b422374d4.pdf?index=trueIn PDF document text
    • http://fojakosi.atwebpages.com/50_shades_of_gray_soundtrack_2.pdfIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_ad8d8c65e6f74fc193df310c6c0b9782.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/16281328582.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/ikea_malm_queen_bed_frame_low.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_7766f40449dc4ba789cd62cafec7b699.pdf?index=trueIn PDF document text
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_e02f6659f1724049891aa35d4b28b66c.pdf?index=trueIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_a9ed0520a3d449458b2f9caab8251451.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/alagey_alagey_tamil_audio_song.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_off0000e745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE745 5436 bytes
SHA-256: 58b2356d5da4e04f2d69a857946458cea45f98b2b555b592504e4cb46a9c1429
font_01_sfnt_off0000f9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A0 10932 bytes
SHA-256: 52817b7ea448e6b103148313d11ea06ac468a897540e9e7b89537e05b235d40d

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