Malicious PDF — malware analysis report

Static analysis result for SHA-256 7452dce2595e7f18…

MALICIOUS

PDF

112.9 KB Created: 2021-03-30 06:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a8bcf7250a8101e503bd0cf5e9f3c95a SHA-1: c4306d59126e43ef04aa2b50f5769483766a9e61 SHA-256: 7452dce2595e7f18c30a65e66c3d74ca2489b0819be8e471468ea281e4d78965
186 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, containing numerous external URLs pointing to various domains. The presence of a PDF_SEO_LINK_FARM heuristic firing, along with a high ML score and ClamAV detection, strongly suggests malicious intent. The document likely serves as a lure to direct users to potentially malicious websites, possibly for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • 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://jumiwimov.ru/award?keyword=asterix+and+obelix+comics+in+bengali+pdf PDF link annotation
    • https://xutifapob.weebly.com/uploads/1/3/2/7/132712150/koxanexinig.pdfIn PDF document text
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/xosojazofalesajatu.pdfIn PDF document text
    • http://harkateine.fun/45170455072xkval.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/dadiv.pdfIn PDF document text
    • http://tarusexozof.iblogger.org/10329005881.pdfIn PDF document text
    • http://insurancesouk.com/97496431340ailnu.pdfIn PDF document text
    • http://lunotikipadul.66ghz.com/accel_world_ending_1.pdfIn PDF document text
    • https://dobabolomibela.weebly.com/uploads/1/3/2/6/132681713/ruvele.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://felepav.epizy.com/samsung_un60j6200af_stand.pdfIn PDF document text
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_63a99cd540194ac0a0729d6aa0bf0821.pdf?index=trueIn PDF document text
    • http://futebowa.atwebpages.com/estrus_cycle_in_cow.pdfIn PDF document text
    • http://lajirobodogew.epizy.com/zifimitulezenujemi.pdfIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_d30e5865f1914ddfa15a4ff153ac994d.pdf?index=trueIn PDF document text
    • https://c779a0a5-5a96-4308-8c37-720837e0bdd2.filesusr.com/ugd/4f1d02_71b9f5520fa24a8b97323032abb263a0.pdf?index=trueIn PDF document text
    • http://nudoritane.atwebpages.com/14121874630.pdfIn PDF document text
    • http://nosofaxiwobud.epizy.com/16963187688.pdfIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_3c15d6a2724b4fbe85fbb04e2cc09534.pdf?index=trueIn PDF document text
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_41a6e9d2fa634a4cb77c3468dc1ffcd5.pdf?index=trueIn 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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EC 4956 bytes
SHA-256: b0a7dba5bc559e50f462ff8c85c68d098a14abb63035a3213c7e42421838436d
font_01_sfnt_off000114e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E7 5672 bytes
SHA-256: b877c088150a8ec7a4734edcd2fcf4884d987f12f510bff7fdcc66a53704fb03
font_02_sfnt_off00012818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12818 7140 bytes
SHA-256: 4401da40f4dcfa6c2e66cf4e20bc1d0023b58a5b1cd4e48a0ea8ba76e0921499
font_03_sfnt_off00013eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB6 4348 bytes
SHA-256: 6c5e4ef0cb2f0ba33611e8bf95454a30a09c98bc4b3cdd5b6d4da305b73fe583
font_04_sfnt_off00014d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D73 19784 bytes
SHA-256: 4e87d97ebf03da2f269de2e92924c80c7b0c298510e99889fb83daf52ce21f3e
font_05_sfnt_off00018766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18766 18672 bytes
SHA-256: ce5d27274887782206d9e0714fb8595ab61dc61a4ce2eb2c4bfaa9f5c4e67f70
font_06_sfnt_off0001a555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A555 3356 bytes
SHA-256: 8b9c98f4a24a5e091e660480ce90fab582d07af112d8aeb73859473adfa5daca