Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33906da544bf88c…

MALICIOUS

PDF

75.3 KB Created: 2021-04-01 10:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 347d904f9f5b7aa4518a296798dcf6ae SHA-1: 932d0c8a411db8b82ed062b3146f73c065a90960 SHA-256: a33906da544bf88c2795d5997b831329559a26d663bf04460a0af9ced3cfe627
96 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=murphy+%2526+roberts+understanding+property+law PDF link annotation
    • http://aycotoro6.xyz/how_to_compare_and_contrast_art7vkbu.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/bsc_pcm_syllabus.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/53918287993iapop.pdfIn PDF document text
    • https://cdn.sqhk.co/dojarodawiw/Wgjgggj/best_crafting_games_xbox_one.pdfIn PDF document text
    • http://samoe-samaya.ru/bulave_tujhe_song_female_version6dbfn.pdfIn PDF document text
    • http://mmmmmme.space/69182473111ybyip.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/CjjiDha/37928617546.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/bhagavad_gita_chapter_15_in_kannada.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/WRsVZlE/mexisamirobakefomirozalo.pdfIn PDF document text
    • http://rrrrkkkkk.space/nes_emulator_proma7mv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nokiva/bow_master_mod_apk_2._12._6.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/25865060360.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/retirement_planning_canada_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b91129-c975-4e7e-aec1-571900735fd6/is_it_worth_buying_a_refurbished_kitchenaid_mixer.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/best_manual_espresso_machine_nz.pdfIn PDF document text
    • http://timojodabemisux.myartsonline.com/33070743573.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/14504189445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a65545d-7506-4bf3-8212-690021ad4f4d/65413183150.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD5 4008 bytes
SHA-256: c6a43ea1c5eeb85114cd3046e8a5e7bf0fcb82a3fb2f35b316079da5619e6bd6
font_01_sfnt_off0000eb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB63 11864 bytes
SHA-256: e6ea91694fda03a60bd7c7b7a63c5b7858d1fc89c9d738948be9c825bf06a1dc
font_02_sfnt_off00011245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11245 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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