Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c65e3423ff2868…

MALICIOUS

PDF

89.5 KB Created: 2021-03-29 23:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0223aa89bb7cdaf9e829cf3a321809b3 SHA-1: c561c46df3d16cef4909828baba8addcb98894de SHA-256: f9c65e3423ff2868330b6d2b15dc8803c9f4b381797ca72d06ee134047dcd0e9
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating the presence of external URIs, specifically pointing to a URL that appears to be a lure for pension scheme details. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=atal+pension+yojana+details+in+tamil+pdf
    • http://zatawonilar.iblogger.org/wedavezegeg.pdf
    • http://inter-kalinka.ru/kwame_nkrumah_neo_colonialism_definitionazoax.pdf
    • http://ogranicbio.space/poniwominubawugils1i7.pdf
    • http://jinowibiko.iblogger.org/buxojiselaletasebe.pdf
    • http://trudogoliya.online/atwood_rv_furnace_not_working0kxc7.pdf
    • http://gurerawe.22web.org/bulej.pdf
    • http://gikubozudunol.iblogger.org/29889351682.pdf
    • http://opensalle.xyz/nudizogamudadisimome0cvic.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7c8cd3e7-15c6-4e43-b30a-63324fef8927/mlk_letter_from_birmingham_jail_essay.pdf
    • http://joxumokuri.epizy.com/31707748414.pdf
    • https://s3.amazonaws.com/purixifusipelid/21_buttons_apk.pdf
    • https://uploads.strikinglycdn.com/files/32bc7143-d8c3-4313-ab92-c48c63e3f298/87218997785.pdf
    • https://uploads.strikinglycdn.com/files/4c8017f1-9b07-474f-b0d1-019da6f48ab9/tenemo.pdf
    • http://turitize.rf.gd/funny_bone_defensive_driving_test_answers.pdf
    • https://uploads.strikinglycdn.com/files/d9ffff2a-75af-43e5-aae2-15a87d87cc4f/zoom_5352_manual.pdf
    • https://uploads.strikinglycdn.com/files/04918aaf-9489-4db4-bba5-82a49eb0161a/dell_latitude_e5400_memory_upgrade.pdf
    • https://s3.amazonaws.com/nefagolom/wooden_playhouse_plans_free.pdf
    • https://uploads.strikinglycdn.com/files/3ae08466-3392-4e77-a9d3-a39a63925a70/sony_icf-c1_service_manual.pdf
    • https://s3.amazonaws.com/zufojadibi/kenajabimenebibabetofofe.pdf
    • http://desabukil.epizy.com/95239528394.pdf
    • https://uploads.strikinglycdn.com/files/4661098a-2225-4502-b7c1-35ff6f797e00/korg_sv-1_88_for_sale.pdf
    • http://kitakel.epizy.com/idsa_guidelines_uti_pediatrics.pdf
    • https://s3.amazonaws.com/ginutu/luwinapulavakijuvofikebo.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_003_off000101dd.bin
b540f50509adcdf0c294ccfbbd190edba8a0ac56e12a7edc7f74b66ef9faf701		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x101DD 23612 bytes
font_00_sfnt_off0000effc.bin
fd269a6ca044d20f4efbb971a41b136583bfa1d507ca996c6efb2e6ba603d77a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 5256 bytes
font_02_sfnt_off0001340c.bin
e3db03a9df81d5884e355c32b096c63b8836d1eae90260909b11f39b1261daf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1340C 9772 bytes

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