Malicious PDF — malware analysis report

Static analysis result for SHA-256 996b3c880f935641…

MALICIOUS

PDF

92.0 KB Created: 2021-03-27 09:58:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23f9045575f3ae0c8a53704911f5d8d7 SHA-1: 74a786f2753752c9ce0e4c79f0bdb7caeed9847c SHA-256: 996b3c880f9356414e199bea996040e5ad7b24c2f0f7e77158f17bebff5378fd
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

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://bologen.ru/award?keyword=produccion+de+acido+glutamico+pdf
    • https://cdn.sqhk.co/rufomezin/0kaggji/14265760525.pdf
    • http://ritixabig.iblogger.org/orchestral_plugin_fl_studio.pdf
    • http://wuvaviw.iblogger.org/57684143685.pdf
    • https://cdn.sqhk.co/kivipemo/Dvidgjl/android_nougat_32_bit.pdf
    • http://labapewuxumawix.iblogger.org/13107607580.pdf
    • https://cdn.sqhk.co/doxanusubomo/mNgejbX/smart_guide_your_personal_travel_audio_guides.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dufosulux.epizy.com/download_mapa_mundi.pdf
    • https://s3.amazonaws.com/luworizesupox/what_is_a_hard_lead_pencil.pdf
    • https://s3.amazonaws.com/wenobagupexekap/2002_honda_rancher_350_foot_shifter.pdf
    • http://jijopefugowebe.epizy.com/risk_assessment_in_mental_health_nursing.pdf
    • http://lulanojejol.epizy.com/adsl_router_configuration.pdf
    • https://uploads.strikinglycdn.com/files/2a2cacda-2581-4dde-92d4-05d0a146dd9d/midugeganakimitutukimi.pdf
    • https://s3.amazonaws.com/fekazudabo/wozorumafudabixigaguwen.pdf
    • https://uploads.strikinglycdn.com/files/31fd1ad5-2d7b-4d3d-a744-30e7a4275b54/what_meals_can_i_cook_in_an_air_fryer.pdf
    • https://uploads.strikinglycdn.com/files/1d60ccb2-2a19-43b8-9e0e-bd950b27cb62/bugotadorarosuvidixosa.pdf
    • https://s3.amazonaws.com/xoxaneral/22976633791.pdf
    • http://vizeroxati.rf.gd/lebokejat.pdf
    • https://uploads.strikinglycdn.com/files/29cf7d8a-39ee-4da7-8420-bb358e215293/62442029086.pdf
    • https://s3.amazonaws.com/mexavofezoxi/boardwalk_empire_episodes_guide.pdf
    • https://s3.amazonaws.com/dowadotiju/ratobid.pdf
    • http://kitukogoxav.epizy.com/86094461759.pdf
    • https://s3.amazonaws.com/zurovajij/registro_anecdotico.pdf
    • http://kozifina.epizy.com/wizardry_1_nes_walkthrough.pdf
    • https://uploads.strikinglycdn.com/files/9b6c1b08-f179-4a5f-8e38-7a3fc1b15961/mukukuvom.pdf
    • http://nepejalaziba.rf.gd/netflix_android_tv_box_apk_2019.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
stream_004_off000135ce.bin
4b9b92709ec29bc625218cf1d33a8cdec14e4988336e2fa8ed97992879573dfe		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x135CE 15240 bytes
font_00_sfnt_off0000fe64.bin
1506e1fb5ce41d953e475ade21ef5d396ff1a683a6d14cdc4a6571f05a0cb5f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE64 5296 bytes
font_01_sfnt_off0001105a.bin
2b5708ff40c7f33cf91870fe2a830a835f31a3fc12b4869d09940e05ea84b37c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1105A 10912 bytes

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