Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff4eb1962f3035d…

MALICIOUS

PDF

84.4 KB Created: 2021-03-15 18:06:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f6075356c9bf0fcf771ecc253d02bb0 SHA-1: 7cf7c2550d6e5109a59876444da10325cf713cab SHA-256: 9ff4eb1962f3035d4c29c37db10c6739e4d01f9bd6e4e2eb2d854f24389678a0
96 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. It contains an embedded URI pointing to a suspicious domain, likely intended to host malicious content or redirect the user. The document body, though heavily obfuscated, contains references that suggest a lure related to games or unblocked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://vilenefex.ru/wix?keyword=boxhead+2+unblocked+76
    • https://cdn.sqhk.co/towinomer/Of0AheN/immigration_detention_center_philadelphia.pdf
    • https://static.s123-cdn-static.com/uploads/4464862/normal_5fffaf7d85032.pdf
    • https://cdn-cms.f-static.net/uploads/4447271/normal_6010da006deb2.pdf
    • https://cdn-cms.f-static.net/uploads/4502178/normal_604b54a8d1ed3.pdf
    • https://cdn-cms.f-static.net/uploads/4500667/normal_6046272571e6b.pdf
    • https://cdn-cms.f-static.net/uploads/4470543/normal_6014ca8f2e2e6.pdf
    • https://cdn.sqhk.co/favejofu/hhjVhg2/class_dojo_monsters.pdf
    • https://cdn.sqhk.co/fodexuxefeba/c9jQcSi/magupipetawutejidixi.pdf
    • https://cdn.sqhk.co/xufojidaju/ftjhif3/why_won_t_my_verizon_apple_music_work.pdf
    • https://cdn-cms.f-static.net/uploads/4402745/normal_60331aa7d67e8.pdf
    • https://cdn.sqhk.co/lonuxogugexi/i7phhZI/sikix.pdf
    • https://static.s123-cdn-static.com/uploads/4375351/normal_600627abc1550.pdf
    • https://static.s123-cdn-static.com/uploads/4499329/normal_5feb7cf784b79.pdf
    • https://sites.goog
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kizugokofo/what_is_the_invoice_price_of_a_2019_toyota_camry.pdf
    • https://uploads.strikinglycdn.com/files/6bbcce16-2627-44f0-9d8c-3bf4f4b0a118/wowodalozekale.pdf
    • https://uploads.strikinglycdn.com/files/dfdd51ad-1eda-4f88-b099-a11727607f56/how_to_do_digital_dog_portraits.pdf
    • https://uploads.strikinglycdn.com/files/83af9e47-8fa0-4fea-b01a-b02cc1e84dc0/xekorawavesilewugok.pdf
    • https://s3.amazonaws.com/ritoma/bunoju.pdf
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_648330e51e60496bb309f1193d13954d.pdf?index=true
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_6a4684898f5e40ccafeb01d70bcef344.pdf?index=true
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_169a9df7e2434461903feba6f3849742.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7acb5c0f-21cf-4cd4-87c5-720b65426a62/motorola_two_way_radio_ebay.pdf
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_847c043dc8b0412a84bd7a5cf0719e00.pdf?index=true
    • https://s3.amazonaws.com/mejados/dragonvale_breeding_guide.pdf
    • https://s3.amazonaws.com/wizedumi/59608209057.pdf
    • https://uploads.strikinglycdn.com/files/30cc11d6-acfc-488c-b1a4-40688eb41e4a/zujakubixogufitajotob.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f51d.bin
2e66b265065c01d14190c1630622be5b0c1289b112e5e1da4886738907ce8081		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 5440 bytes
font_01_sfnt_off000107a3.bin
bc3d29bf1a5c005408499e0e030f273b1c6e7aa3960208c2a081a6dbda3d632b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107A3 11360 bytes
font_02_sfnt_off00012e8b.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8B 16204 bytes

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