Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34b6e923e31c756…

MALICIOUS

PDF

87.8 KB Created: 2021-03-12 00:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 055ee1fcdd7d6292c155071f508be222 SHA-1: 7d4759b69022ef527e696e3e14ddecfa710d3cb9 SHA-256: f34b6e923e31c7563ee1f8d6b6c3f2515e9b6b1bf32630688f7c6b8769b72220
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains an embedded URI pointing to 'https://resalured.ru/award?keyword=scert+books+pdf+up', which is likely the download location for a secondary payload. The presence of a 'download button' heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=scert+books+pdf+up
    • https://static.s123-cdn-static.com/uploads/4409610/normal_6009ab25504ae.pdf
    • http://vuwimoxit.mygamesonline.org/agricultural_marketing.pdf
    • https://cdn-cms.f-static.net/uploads/4380867/normal_6025cc34ec1f3.pdf
    • https://static.s123-cdn-static.com/uploads/4405206/normal_5ff2295224a27.pdf
    • http://lesuxofozadize.mygamesonline.org/61182064266.pdf
    • http://pifemukopisare.sportsontheweb.net/after_we_collided_movie_release_date_america.pdf
    • https://cdn-cms.f-static.net/uploads/4383446/normal_602e13ef20b99.pdf
    • https://static.s123-cdn-static.com/uploads/4380230/normal_5fe4b9a9471f5.pdf
    • https://cdn-cms.f-static.net/uploads/4385876/normal_60494c61674f0.pdf
    • https://cdn-cms.f-static.net/uploads/4401714/normal_5fd8d2bb0e968.pdf
    • https://static.s123-cdn-static.com/uploads/4473645/normal_5ff4d2818ac2e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/81ceb772-1008-4dcc-a746-86b8c2c9b761/dunkin_donuts_bagel_vegan.pdf
    • https://uploads.strikinglycdn.com/files/8c637099-c2cb-4560-aceb-8ade5df5c3d3/figukepukawubusilafe.pdf
    • http://zotubune.myartsonline.com/15_hp_gamefisher_outboard_weight.pdf
    • http://laxufazekez.atwebpages.com/pedavisijoxibis.pdf
    • https://uploads.strikinglycdn.com/files/298aba6a-0f8e-4d3a-9238-1bb9b9a09b7b/why_is_the_wave_movie_rated_r.pdf
    • https://s3.amazonaws.com/selivuvumepaveb/mapevetozuzowafoba.pdf
    • https://s3.amazonaws.com/xipavir/xawugevu.pdf
    • https://s3.amazonaws.com/garorowa/22241006054.pdf
    • https://uploads.strikinglycdn.com/files/ab9af7ae-30b8-4a93-8711-54c5b1d250e6/ragupoxebivariluxotes.pdf
    • https://s3.amazonaws.com/nabifovu/knights_and_dragons_armor_stats_spreadsheet.pdf
    • https://s3.amazonaws.com/wujodibu/married_couple_images.pdf
    • https://uploads.strikinglycdn.com/files/6c4612ca-5f31-48ac-a36e-fcbb66545c75/97700853899.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f474.bin
561720fe98c53fba99b01626dfd4043c2bccd5aa84b6458648740b679caa2852		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF474 4940 bytes
font_01_sfnt_off0001054d.bin
5ac859261c017db3130afa25cacc40911302187bd7e6021936eea09bb7cfcd4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1054D 9972 bytes
font_02_sfnt_off00012778.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12778 4324 bytes
font_03_sfnt_off00013578.bin
615b012c9e063f545230d7f7e0a912f75d5518700ae8551a9f6eec1a4daaf334		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13578 8280 bytes

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