Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5b5c4a9e848e53…

MALICIOUS

PDF

79.9 KB Created: 2021-03-19 05:16:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee70eb87425b0d6d878952b5cd79338b SHA-1: 2511d9e08a4ad526e8d66773b9abc12ecae9d997 SHA-256: eb5b5c4a9e848e53a1368cecf7b42acea5583224444d83bdb5de62d0d5f561b5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URL 'https://pelibifir.ru/aws?utm_term=harry+potter+series+chronological+order' and the link farm URL 'http://pugumatinudozid.iblogger.org/rokisotelukumamifita.pdf' are the highest priority IOCs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/aws?utm_term=harry+potter+series+chronological+order
    • http://pugumatinudozid.iblogger.org/rokisotelukumamifita.pdf
    • https://sebanibukuj.weebly.com/uploads/1/3/4/3/134354661/6197451.pdf
    • http://pifezix.22web.org/sizadoditunelit.pdf
    • https://pilinuxuxip.weebly.com/uploads/1/3/2/8/132814996/f2783867.pdf
    • https://vapomawuwe.weebly.com/uploads/1/3/1/3/131398268/f448e.pdf
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/4181362.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tumozuj.epizy.com/bratislava_tourist_guide.pdf
    • http://bogutofiwib.rf.gd/pollination_worksheet_grade_7.pdf
    • https://s3.amazonaws.com/daxemo/2239928204.pdf
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_a3aedad829734c549cf327b66180b159.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6b6a63db-0658-479b-9a2f-73d680f96466/fezewodatokofurepasa.pdf
    • https://uploads.strikinglycdn.com/files/a8d39621-965c-4354-b315-df49873d82c1/28326978854.pdf
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_22094ecfba954ffd9f80318436157637.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9380c9a2-af50-42b1-9d83-dbc23adc4c21/xazavoni.pdf
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_5146491b203b41dea7c8c2deff34d647.pdf?index=true
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_80098d109c21419fa7677b41862c395a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/781bf525-b1ae-4092-b42f-eacdd3655366/deepak_chopra_seven_spiritual_laws_of_success_summary.pdf
    • https://uploads.strikinglycdn.com/files/d2c65d32-9dd6-4979-b1b2-9b157ece4c3d/51780772471.pdf
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_c900684962274893a9f2a6f14b27613a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d7ee11d8-db57-4942-a0ae-007ba0c0917b/whats_another_word_for_violently.pdf
    • https://s3.amazonaws.com/bejeseja/15971651855.pdf
    • https://uploads.strikinglycdn.com/files/438ec911-849c-4f64-a08c-2f9df81d6e60/cooking_mama_lets_cook_all_recipes_apk.pdf
    • https://s3.amazonaws.com/lejivugeleguwod/ruguladamenugefofexit.pdf
    • https://s3.amazonaws.com/lanorolowu/until_dawn_trophy_guide_walkthrough.pdf
    • https://uploads.strikinglycdn.com/files/f33913e3-59f7-490e-8bd4-a02ef4bd8976/convection_heater_or_oil-filled_radiator_which_is_better.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb2a.bin
a247d9d5cd6a7e25d2c4a9b2f19b7124d54a4a4168ed91785de4fcf952e4d784		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2A 5400 bytes
font_01_sfnt_off00010d86.bin
80c66c58197d6be07b613589c9df7558c0b67dabba9de46ba8906cbcdae84e4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D86 10764 bytes

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