Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb959a7e650b06d…

MALICIOUS

PDF

81.5 KB Created: 2021-04-02 19:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 104a36f1a60883223b5b30b39b07e100 SHA-1: d6b6ef955f5844df230140c062f01c283ec8bd24 SHA-256: 3cb959a7e650b06db1596b11c80392a2135159c6f341f1a07c234412bd10ec10
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that mimics a search result, likely intended to trick users into downloading malicious APKs. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the phishing and malicious download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=safe+site+to+download+apk+reddit
    • http://pesale.pro/36103285937kw2ij.pdf
    • http://reduslimitalia-official.site/7mm_mag_load_data_imr_43505v0pq.pdf
    • http://lelekelosutov.getenjoyment.net/ncert_solutions_for_class_11_physics_chapter_2_-_free_download.pdf
    • http://avit0.pro/gafevokotumikidf1ct.pdf
    • http://fiziwafofekaku.mygamesonline.org/carthage_empire.pdf
    • http://chaptejvxz.fun/498222826318zsv6.pdf
    • http://belkwigs.com/is_monster_an_adjective2umsv.pdf
    • http://mivetys.xyz/12491680560cfe7u.pdf
    • http://potenciy.xyz/plantronics_headset_m70_pairingnxkoh.pdf
    • http://luwakixifotizim.iblogger.org/seda_alessandro_baricco_portugues.pdf
    • http://arenda-comp.space/popofonazaratif9w7.pdf
    • http://hallhq.xyz/53971418990d1khu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_2698f0d72ece438b8272adbecfac3b2b.pdf?index=true
    • https://736f3f86-ac4a-4d06-be6b-3320275ea8ee.filesusr.com/ugd/cd27d0_2b4d21355e7a4ea898f5cd68c7ebc46f.pdf?index=true
    • http://kugilib.rf.gd/how_to_program_verizon_fios_remote_to_samsung_smart_tv.pdf
    • http://bonogeliraxi.rf.gd/levepesegipuduxuriterom.pdf
    • https://s3.amazonaws.com/vabemavuputenif/asus_ac1900_rt-ac68u_wireless_router.pdf
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_86a58be745bc4cfcaab28f0d761919fc.pdf?index=true
    • http://nifibomagogov.rf.gd/88672661038.pdf
    • https://s3.amazonaws.com/lopadivupudexa/lave_linge_bosch_maxx_5_performance_1200.pdf
    • http://pujumek.myartsonline.com/divemog.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001016b.bin
05631551e7be6ccd95f0f71971c9f8033948b88d63c87aa05b057b9528c36379		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1016B 5292 bytes
font_01_sfnt_off00011394.bin
518bab50a36175735941ab06028346b2625e863e0bcc19de8101baf69608e60e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11394 10944 bytes

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