Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32e7a12c067f819…

MALICIOUS

PDF

77.9 KB Created: 2021-03-14 09:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0544dffb7496cf8083e8a02031af92bf SHA-1: 1d12fe33359014d0ffd424947e9cfc2a53af1faa SHA-256: f32e7a12c067f819eb586ca54c9e36d323f45603bf3619a11e42d2410de22c28
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URIs, many pointing to disposable domains, strongly suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nipisod.ru/strik?utm_term=computer+hardware+devices+ppt PDF link annotation
    • http://phulop.store/pet_sematary_2_2019_casty1ky2.pdfIn PDF document text
    • http://fufetaka.iblogger.org/phool_bane_angaray_film_video.pdfIn PDF document text
    • http://persequenteamsohbet.com/rival_automatic_steamer17xv9.pdfIn PDF document text
    • https://xavilisepu.weebly.com/uploads/1/3/4/2/134235747/4104173.pdfIn PDF document text
    • http://xivagoz.22web.org/how_to_install_rhinoceros_5_crack.pdfIn PDF document text
    • http://mavedelusudefiv.22web.org/kowofuwusifevipokufofo.pdfIn PDF document text
    • http://okrasote.info/diary_of_wimpy_kid_long_haul_full_movie_onlinevsxhg.pdfIn PDF document text
    • http://urott-hu.com/hide_worksheet_in_excel_2003jjg3v.pdfIn PDF document text
    • http://pop-marketplace.ru/jugiwejozupegezotisavokebryrl0.pdfIn PDF document text
    • http://rejonozafazimut.22web.org/annexure_ii_form_for_job_work_format.pdfIn PDF document text
    • http://fishland.store/989991056786rjha.pdfIn PDF document text
    • http://likelid.xyz/87727275489t5jy.pdfIn PDF document text
    • http://fisuruwibowin.66ghz.com/coleman_roadtrip_lx_grill_parts.pdfIn PDF document text
    • http://discount50.pro/lulobipap512fr.pdfIn PDF document text
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/1508675.pdfIn PDF document text
    • http://zhk-rekord.info/old_school_music_from_the_60s_70s_and_80s_slow_jam_video615vr.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
    • http://musomowelego.epizy.com/8051_assembly_language_programs.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/6188923053.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/nitudopexitunixopekuge.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/amana_dryer_ned7200tw_repair_manual.pdfIn PDF document text
    • http://tetaxejil.rf.gd/m_audio_oxygen_49_usb_keyboard.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/91193274970.pdfIn PDF document text
    • http://fejivexol.epizy.com/caylee_anthony_autopsy_report.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_off0000e672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE672 5232 bytes
SHA-256: 266b9998bfd9a1a995e169b2f165c7007ce0e8d292b94697fc6e602621813497
font_01_sfnt_off0000f85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85B 10572 bytes
SHA-256: 6d799490a2da6c91476316ec7ab8aff257c479bea5662b4bf3c48868b11cbcb0
font_02_sfnt_off00011c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C55 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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