Malicious PDF — malware analysis report

Static analysis result for SHA-256 3536d1e14912e366…

MALICIOUS

PDF

70.8 KB Created: 2021-03-24 11:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68058a0198b70b1b3e4dd3314fbfc829 SHA-1: 2446589751ddbb28bcd7026a8f606c237ed7a051 SHA-256: 3536d1e14912e3669213635505e6cbf65f8910c4962c8407b4c198b231148933
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'soxebez.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'worksheet pdf answers', aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://soxebez.ru/wix?keyword=ser+o+estar+worksheet+pdf+answers PDF link annotation
    • https://cdn.sqhk.co/fikalibumi/cidO88b/acrobat_reader_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/hfqhbm3/sacred_games_dialogues_ringtones.pdfIn PDF document text
    • https://cdn.sqhk.co/ridijafugemi/jeicjZ5/cooking_fever_cheats_gems_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/voravaxa/n4iaihb/cute_aesthetic_collage_wallpapers_for_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/tatonabufule/ejghjkD/maze_escape_minecraft_level_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_c6d22a43d17b4773ab672fa079f194de.pdf?index=trueIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_2c1dad9976be4127bab638fb8f183297.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/10351073467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe640be-545c-47ca-963c-a3eaada330e7/erich_fromm_the_sane_society_quotes.pdfIn PDF document text
    • http://dejibokakar.onlinewebshop.net/a_carochinha_e_o_joo_rato_luisa_ducla_soares.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d624d33-dbba-4ecf-b047-ebd6f30c3baf/masterbuilt_30_electric_smoker_chicken_wings_recipe.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/what_is_soak_pit_for_transformer.pdfIn PDF document text
    • http://varirojemixu.myartsonline.com/59047651527.pdfIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_1a3f15fbcc4c4ba8962a58bb22158d91.pdf?index=trueIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_827b122ab7524d7d9ef68a7155325ce5.pdf?index=trueIn PDF document text
    • http://fomepufasele.atwebpages.com/aviation_english_macmillan_download.pdfIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_f25f06db17e2496999552cc0633f3ae4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9724a85-4b1d-49cc-9c1a-b822e1600bf5/how_to_smooth_textured_interior_walls.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/taxubaraxugatutepalemo.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_85e7ceab3d3a4ebcb3d7833dc71e09b1.pdf?index=trueIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_eeb5f93e21c04748ba041fc07b9600ac.pdf?index=trueIn 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_off0000d551.bin
c114069efd7a558ffde3657b30a09423251f9b70498c0171a1e0869af8fb6a64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD551 5356 bytes
font_01_sfnt_off0000e79a.bin
1deac5e3302b41a733845c34e897fd1d98aa2dac3c412733c6fdf29d1a21ebda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE79A 11580 bytes

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