Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d743fbb98329dc…

MALICIOUS

PDF

81.9 KB Created: 2021-03-28 02:47:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40e100a11ad2622221c29f7b60ce881b SHA-1: 64ccbcb970ffd4b4f448ee80207b7123692ab476 SHA-256: e0d743fbb98329dc7381b85a1e1b8579047ca3c40aa88e3520835f781d031ffa
156 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a URL that appears to be part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/award?keyword=best+biodata+for+marriage+pdf
    • https://cdn.sqhk.co/letareximo/xPjijio/now_money_account_transfer_to_paytm.pdf
    • https://cdn.sqhk.co/vafodagusun/MQsigji/nuterafubivi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/poguvelefa/is_there_a_filter_on_an_lg_top_load_washer.pdf
    • https://s3.amazonaws.com/falejogajir/milamurub.pdf
    • https://uploads.strikinglycdn.com/files/77233ca2-7b31-467f-a1c6-eb5edc8796b2/printable_timesheet_template_free.pdf
    • https://s3.amazonaws.com/benuka/amrinder_gill_movie_lahoriye.pdf
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_fabedba4c5dd4f50b088042b03a4e5b6.pdf?index=true
    • https://s3.amazonaws.com/kotenu/cisco_packet_tracer_free_7._1.pdf
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_dd70fa3865b24504a0519f832fe3b974.pdf?index=true
    • https://s3.amazonaws.com/gotijejaj/plenty_of_fish_app.pdf
    • https://s3.amazonaws.com/tikoweravisixu/how_does_density-independent_factors_affect_population_growth.pdf
    • https://s3.amazonaws.com/wudibirewuduto/baby_birthday_song_pagalworld.pdf
    • https://uploads.strikinglycdn.com/files/2c8bef1d-a0ea-4743-99da-0e25c91b48b2/business_intelligence_and_analytics_courses_in_singapore.pdf
    • https://uploads.strikinglycdn.com/files/2b82ce4c-86f8-4211-9d72-485943a809d7/85301726740.pdf
    • https://uploads.strikinglycdn.com/files/ff7d459e-1726-4010-b41e-1830cb754c9a/set_xfinity_dvr_online.pdf
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_334219c472524446bf6849cb1f01f095.pdf?index=true
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_f7ebeffcd5584c0888c4a4850fa54d12.pdf?index=true
    • https://s3.amazonaws.com/xasovewipeje/mozaseburoxilati.pdf
    • https://s3.amazonaws.com/rodakarugupoko/castration-_resistant_prostate_cancer_aua_guideline.pdf
    • https://uploads.strikinglycdn.com/files/122f1aed-6630-4f8f-88d0-0d592b64c2a7/critical_hit_led_dice_set.pdf
    • https://s3.amazonaws.com/legapatatezisa/zosomukavufanekudupofebur.pdf
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_c07e941a247a448a8f8cbb0289bd6b2e.pdf?index=true
    • https://7a512b58-7189-4bc4-8343-f643fa9054c9.filesusr.com/ugd/1e52da_687183cf53e740bb86a605e332a22621.pdf?index=true
    • 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_off00010236.bin
d16149f3f693f5f36344b68cb2620316a1b8ddb3f8ed286f6e876a31ebc70f9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10236 5516 bytes
font_01_sfnt_off000114e1.bin
75510b293e2ca0f6a5949bb02a3133a11014765130202f8db3b8b537bb9ad7e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114E1 11088 bytes

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