Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84adb95d48cb7d7…

MALICIOUS

PDF

77.9 KB Created: 2021-03-25 01:02:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60f6b27a47e5f36be14141c998ca59e8 SHA-1: 7ca58028091c41d3e8b4d44a1f5e81c278bd3c84 SHA-256: b84adb95d48cb7d705fc18d0b8243aeeb6a996314714bf550b455c55b60ece32
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 URL that redirects to a suspicious domain, likely intended to trick users into visiting a malicious site. The document body, though heavily obfuscated, contains text related to 'vegetarian recipes' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • 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://gimoguvi.ru/strik?utm_term=vegetarian+recipes+easy+uk
    • https://witetalujoloxof.weebly.com/uploads/1/3/0/7/130740434/7334652.pdf
    • http://dithetsen.xyz/34733419112kt50x.pdf
    • https://lirobepofuneve.weebly.com/uploads/1/3/0/7/130740173/naxun_kajesiwo.pdf
    • https://pakipuxis.weebly.com/uploads/1/3/5/3/135347710/mafiti.pdf
    • http://rodina38.ru/jipuzuzot4dvwf.pdf
    • http://fruit-ital.space/4422435357220744.pdf
    • http://shoop-fm.ru/android_app_tutorial_visual_studio_2017opzx8.pdf
    • https://dunidapakepew.weebly.com/uploads/1/3/4/3/134319263/waxatafov.pdf
    • http://circulyarkadigital.xyz/what_to_do_when_you_feel_empty_in_a_relationshipbd19k.pdf
    • https://finijigif.weebly.com/uploads/1/3/2/6/132681422/nisajepita.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_26f5fe07524a4f81a21ff272299230a1.pdf?index=true
    • https://s3.amazonaws.com/tafogusegabomu/51036337527.pdf
    • https://uploads.strikinglycdn.com/files/5b751029-ab66-43bc-b79f-9d068a3fad7c/exerpeutic_gold_525xlr_folding_400_lb_capacity_recumbent_exercise_bike.pdf
    • https://uploads.strikinglycdn.com/files/24da7d11-49c4-4b79-9ecf-597ba33b279e/rikisetoz.pdf
    • https://s3.amazonaws.com/lusabifef/latest_ios_update_for_iphone_6.pdf
    • https://s3.amazonaws.com/duzexefemosaxe/arcgis_malaysia_map.pdf
    • https://3211d54f-29bc-45c2-8691-939fa64f7450.filesusr.com/ugd/2e34c2_ea7a37207fea40ccb9149aa7776ab183.pdf?index=true
    • https://s3.amazonaws.com/zozuxukoxo/athlean_x_inferno_max_size.pdf
    • https://s3.amazonaws.com/megelugik/51796642846.pdf
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_9e80c06fb98e494b8ff3a25941fccaee.pdf?index=true
    • https://s3.amazonaws.com/jalasilunaz/18124041179.pdf
    • https://3175e58c-9db9-4d87-bcb9-15e03531d93d.filesusr.com/ugd/c93210_c4b855d2a94d4a2e8002ba23039188c5.pdf?index=true
    • https://s3.amazonaws.com/bogeguva/judafenaxafanazesonaju.pdf
    • https://uploads.strikinglycdn.com/files/f42f024d-ac98-4593-9d23-49dcc473381e/the_girl_who_owned_a_city_movie_trailer.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_off0000e557.bin
075dd081212df287c44885e62af7ad06b5d0889fabbd2327928c4ddfc57d201f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE557 4972 bytes
font_01_sfnt_off0000f65a.bin
39777c7af66842903839bdc9dae34c38dc16c6b61739c0690b8803cde515b844		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF65A 10672 bytes
font_02_sfnt_off00011a5c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5C 4324 bytes

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