Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea610a3fe0c5f7cd…

MALICIOUS

PDF

120.7 KB Created: 2021-04-08 07:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b7f75e2551592565e3cc09077cea32d4 SHA-1: 5af41a59d01047bbcf74fb9896ddf1203f34fb89 SHA-256: ea610a3fe0c5f7cd43cf30ba121ef56f8ec8c37188acf7a400fe5c202244a64e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/wix?keyword=golmaal+4+full+movie+watch+online+dailymotion PDF link annotation
    • http://masito.space/nidawiruwebetijuronexudisju.pdfIn PDF document text
    • http://1freedom.space/matematik_zml_soru_bankas_indirhlqk3.pdfIn PDF document text
    • http://creditscoretracking.info/is_the_dremel_4000_any_goodlvp5p.pdfIn PDF document text
    • http://kostlike.site/next_phase_of_human_evolution8apiz.pdfIn PDF document text
    • http://like-store.site/xagutodibafesilenulriyax.pdfIn PDF document text
    • http://kellys.space/62325244870zzq9c.pdfIn PDF document text
    • http://getveran.site/nivavininewezepivimikazajligih.pdfIn PDF document text
    • http://organicnu.info/836728823673ujaw.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/lurekeb068s8.pdfIn PDF document text
    • http://vkysnaya-eda.site/lagu_medot_janji_palapajykm5.pdfIn PDF document text
    • http://onlinekartiadesi.com/vande_mataram_lyrics_in_tamilu0ocz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tajafex.rf.gd/62732576588.pdfIn PDF document text
    • http://rovetenexosa.rf.gd/fagudekokexajezujamofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a900067d-9cc7-456a-902a-89de9901401e/what_is_lattice_point_in_solid_state.pdfIn PDF document text
    • https://aa700e4b-9450-4a85-8b7e-8c92ffe47626.filesusr.com/ugd/de972d_019f6c2f11124b9984c4c766410a9748.pdf?index=trueIn PDF document text
    • https://f8206d31-21c4-4aef-9da9-e4259ded718a.filesusr.com/ugd/c2bdac_fd79154cded74e26b457148733c252ff.pdf?index=trueIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_137542feea3348ba9d8bcb767ac88d76.pdf?index=trueIn PDF document text
    • http://bodotekufuw.rf.gd/camara_wifi_espia_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6792a68e-fb06-45a7-a035-ae441d131bd8/65893698273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/024087f0-7db1-4095-bbe1-7a0eba05c7b5/jiinju_bubble_sheet_mask_review.pdfIn PDF document text
    • http://lasakarafivof.epizy.com/easy_3_chord_guitar_songs_for_beginners.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E3 40420 bytes
SHA-256: 20ccf02acd01f23e2289a41de0e3a30dfedcd06cc764cb0b17c1545babd554a6
font_01_sfnt_off000183cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183CB 5360 bytes
SHA-256: bc82f1f9734a8b51a95a671ca462d7f84032dbc607e8dd3ea7c73f73a578fac2
font_02_sfnt_off00019609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19609 12048 bytes
SHA-256: 196dab0f414fd20e0b2793261d362371b97255dc1938d7c4274cecf508eab511
font_03_sfnt_off0001be3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE3F 16336 bytes
SHA-256: 0308b7e45e533fc36ed14bb91612a819bec8fedd6a77b969bc726590389af327