Malicious PDF — malware analysis report

Static analysis result for SHA-256 7511d4232fa89185…

MALICIOUS

PDF

99.0 KB Created: 2021-04-07 23:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3866b3f156cf378c4b88488e7fce22f9 SHA-1: 7cdd1f45cfe666952e257bbe8b05ff0bee8458ed SHA-256: 7511d4232fa891854cb08f1e52242c17d1e7ffdbfdbd1279948f2fd1640d3b14
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is also listed as an IOC. The document body, though heavily obfuscated, appears to contain metadata related to the URL, suggesting an attempt to disguise the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • 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://druttle.ru/wix?keyword=belladonna+seeds+rs3
    • https://cdn-cms.f-static.net/uploads/4481665/normal_606ac69f09736.pdf
    • https://static.s123-cdn-static.com/uploads/4373505/normal_5ff52b47a002e.pdf
    • http://gepexoliv.medianewsonline.com/51825935333.pdf
    • http://zebozewazogaso.scienceontheweb.net/xafewilemojerejevuxujeni.pdf
    • https://cdn-cms.f-static.net/uploads/4443598/normal_606c71d3c95d3.pdf
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5fea19544afbf.pdf
    • https://static.s123-cdn-static.com/uploads/4427499/normal_60017f95ca56a.pdf
    • https://cdn-cms.f-static.net/uploads/4421050/normal_6042812051b2b.pdf
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5fe24a5b1c493.pdf
    • https://static.s123-cdn-static.com/uploads/4426423/normal_5ff8ffd983235.pdf
    • https://cdn-cms.f-static.net/uploads/4370987/normal_60120a4d355cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kudowo/magic_chef_gas_oven_parts.pdf
    • https://uploads.strikinglycdn.com/files/980746cd-c50e-47c6-a308-f9e1966f3427/zokuveguzimupemawadez.pdf
    • https://uploads.strikinglycdn.com/files/a20150f9-da19-44cd-adc2-1be6a3d34c57/jidomuvilape.pdf
    • https://uploads.strikinglycdn.com/files/61e4c7a4-99bf-44d6-a83f-5b866b16af4b/how_much_is_dish_tv_and_internet_bundle.pdf
    • https://uploads.strikinglycdn.com/files/45637c12-f21e-410c-af3e-e0abb7e22fcd/earth_stove_100_series_model_3340_parts.pdf
    • https://uploads.strikinglycdn.com/files/2ba02f08-adf6-4a2a-978e-a0d0fd00fb01/paginas_para_aprender_ingles_gratis_online_para_nios.pdf
    • https://uploads.strikinglycdn.com/files/802ce3f6-6f07-4f94-85c7-ef91daa0bcc3/realtek_high_definition_audio_driver_for_windows_10_64-bit_2020.pdf
    • https://s3.amazonaws.com/rupatojuko/pride_and_prejudice_and_zombies_2016_movie_download.pdf
    • http://mifedisiso.atwebpages.com/jekazuvazidexe.pdf
    • https://s3.amazonaws.com/pipaneku/11340713321.pdf
    • http://sofibimibojas.myartsonline.com/35028592311.pdf
    • https://uploads.strikinglycdn.com/files/b7e108c3-801d-45ad-b264-926b75f222ef/9084793317.pdf
    • https://s3.amazonaws.com/devuxuzejozam/adobe_reader_9._1_free_offline.pdf
    • https://s3.amazonaws.com/sajatofubote/bebomogedax.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000138da.bin
a7b715bd68d293217a8465f48b9b6581cee5fc836158f5602852fda71829a8dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138DA 4692 bytes
font_01_sfnt_off000148c6.bin
11b22252867e6043eb0d122bce44ab734b778549d4db8286fcc620475453f1d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148C6 11728 bytes
font_02_sfnt_off0001706b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1706B 4324 bytes

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