Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ac56fd866e8402…

MALICIOUS

PDF

78.5 KB Created: 2021-04-01 12:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bf722e80e09812e59b120b0fe3784579 SHA-1: 6510379441530fd48fb337d0c653a645806f6b9b SHA-256: 30ac56fd866e8402d3c780a725cd628acb00f42f6cd5f716348cd449548c6bee
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the PDF structure itself is used to host and redirect to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/123?utm_term=aplikasi+google+classroom+apk In PDF document text
    • https://cdn.sqhk.co/toxinize/jekRnJl/tryhard_name_generator_fortnite.pdfIn PDF document text
    • https://cdn.sqhk.co/kapipota/difjfhd/archery_finger_tab_pattern.pdfIn PDF document text
    • http://bixekakazozerol.mywebcommunity.org/80130187481.pdfIn PDF document text
    • https://cdn.sqhk.co/murerezusa/drj8iis/dont_worry_be_happy_tamil_song.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/dVgcQha/t_mobile_phone_deals_iphone_11.pdfIn PDF document text
    • http://vutazumadik.iblogger.org/lupixidikexivevitiba.pdfIn PDF document text
    • http://zirekafeti.iblogger.org/10451278262.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/tugezaduwuv.pdfIn PDF document text
    • https://wimukevefom.weebly.com/uploads/1/3/0/7/130739067/xibevixilimikume.pdfIn PDF document text
    • https://cdn.sqhk.co/perokokamosa/dAihia1/bluffing_party_games.pdfIn PDF document text
    • https://lozofuxoxezutuw.weebly.com/uploads/1/3/5/3/135303337/suluv-buwodidaw-xibufakawuvadir.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/GifhiV5/stack_fall_3d_unblocked.pdfIn PDF document text
    • https://motoburibekisi.weebly.com/uploads/1/3/4/6/134623685/vojesurozilevafegik.pdfIn PDF document text
    • https://fupotitora.weebly.com/uploads/1/3/4/8/134883452/1701076.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/Le67hi9/at_t_office_hand_meetings_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jifibipex/hcghfhf/history_of_ancient_civilization_charles_seignobos.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/wositonosivakipevov.pdfIn PDF document text
    • https://gizomedapirev.weebly.com/uploads/1/3/1/4/131454265/jujalipudurogun_waliwigumaj_ropuda_besenen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_b419fc21c9624b46a6961c0b44a55cd4.pdf?index=trueIn PDF document text
    • http://rabatelekovufar.myartsonline.com/la_catedral_del_mar_barcelona_como_llegar.pdfIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_2aed0ea1d6f6427c9b5c5384672b335c.pdf?index=trueIn PDF document text
    • http://xadeboni.epizy.com/7022543878.pdfIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_317f971ec1d2415caeadb5c713a61ffd.pdf?index=trueIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_3518826449bb48cbb6f9a0422b5b1156.pdf?index=trueIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_bdb414a1d99541b6987d7fd7632b6336.pdf?index=trueIn PDF document text
    • http://visasefiji.rf.gd/tv_channel_app_for_android_box.pdfIn PDF document text
    • http://perepidowowavam.epizy.com/3086040563.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF625 5304 bytes
SHA-256: 1b7fec898b51c34a36b0941c23dd0971aeca7c9ab50f831f98100e756651a912
font_01_sfnt_off0001081f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 10612 bytes
SHA-256: c3ec1548d2645317fcde31794a03d1c429a333ca79683ed4742029af07d64fea

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