Malicious PDF — malware analysis report

Static analysis result for SHA-256 6579ec04ee95801c…

MALICIOUS

PDF

77.9 KB Created: 2021-03-29 07:37:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d19351417be48abfb3b6738f144c6e97 SHA-1: a69d8f02dece09bbdb2e157a557f59a6faddc769 SHA-256: 6579ec04ee95801cc20cd369f1a7d32f0223bb49e23e7970bf4a8b8bc44a0ce1
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically identified as a potential phishing lure related to 'list of anions and cations'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of numerous unknown URLs suggests the document is designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/award?keyword=list+of+anions+and+cations+pdf PDF link annotation
    • http://zomixuxoluzijum.mywebcommunity.org/variance_analysis_actual_vs_budget_with_explanation.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/Jicibjc/in-_q-_tel_summit_2019_palm_springs.pdfIn PDF document text
    • http://wgathering.org/portal_mod_for_minecraft_apkmlp0p.pdfIn PDF document text
    • http://dfds.in/pathfinder_npc_codex55ygy.pdfIn PDF document text
    • http://podjem2.club/air_intake_system_workingwixuy.pdfIn PDF document text
    • http://canonsburglake.org/les_journaux_sportif_algerien_enviw8v.pdfIn PDF document text
    • http://bolipoloweda.mygamesonline.org/biblia_traduccion_lenguaje_actual.pdfIn PDF document text
    • http://mstmail.space/45647648273h12i.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/Igdh7M9/yellowpay_agen_pulsa_topup_game_kuota_termuraha.pdfIn PDF document text
    • http://xomofaki.getenjoyment.net/best_c_programming_language_book.pdfIn PDF document text
    • http://ganoget.scienceontheweb.net/webajuz.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/ijajigg/14177853358.pdfIn PDF document text
    • http://fukikenikiru.22web.org/dekatasebukaluropolaba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f171294f-ed7a-4884-a773-1e826a512430.filesusr.com/ugd/20d861_f1f413a3772c471d8bc656a7eff1c524.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d27d286b-b28d-4c65-81ff-7dd1f792f7fd/fender_frontman_25r_schematic.pdfIn PDF document text
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_3d068dcfa2494e008f412aeb6e6afd1f.pdf?index=trueIn PDF document text
    • http://roxegut.rf.gd/90195545793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ead0703-7eba-4fc2-87a1-b1215510d581/where_they_filmed_the_revenant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a547e1e-ef12-4c55-8971-a5063f90f789/what_size_drink_comes_with_taco_bell_combo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cdd5b5f-b325-4587-88cf-fcf896adc4d0/4540879559.pdfIn PDF document text
    • http://jexowenotagimiv.rf.gd/home_flex_installation_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C1 4964 bytes
SHA-256: 51ccdc05ff97a14bb009c6eb929a453906b903ee32380c66b6f878fab9c12cb5
font_01_sfnt_off000103c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C1 10808 bytes
SHA-256: c47c48a1a3f75706f563efde42ec205c81a96c1183cf738d414fedce7c49b603

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