Malicious PDF — malware analysis report

Static analysis result for SHA-256 697f7dd7e0ffd2b2…

MALICIOUS

PDF

93.8 KB Created: 2021-06-11 09:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a0204d96741e122ce0da7da6f33c1332 SHA-1: aa5a9f4d8250672599ff4c25515d594401da4e83 SHA-256: 697f7dd7e0ffd2b23d16eced99cab810ece64a78fa1582c35c8eeb611b75dc30
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nomylo.ru/pbw?utm_term=ilayaraja+melody+hits+mp3 PDF link annotation
    • https://kegovivaxik.weebly.com/uploads/1/3/4/5/134506491/vijesu_wukavobidupum_domagiba.pdfIn PDF document text
    • https://fowowudajij.weebly.com/uploads/1/3/5/3/135312379/6554520.pdfIn PDF document text
    • https://sirunolova.weebly.com/uploads/1/3/5/3/135303996/1803383a556.pdfIn PDF document text
    • https://kepevexin.weebly.com/uploads/1/3/4/2/134234606/2461d.pdfIn PDF document text
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/dd5da36eab2062.pdfIn PDF document text
    • https://gusizamavuva.weebly.com/uploads/1/3/4/6/134629738/7b915e06.pdfIn PDF document text
    • https://ramabubutimelu.weebly.com/uploads/1/3/4/5/134597411/tokesimimudugi-wifokoxofoxejon-xezusibivoxo.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://sofutikajen.pbworks.com/w/file/fetch/144455598/how_to_put_reference_on_capitec_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84e38bed-e2d1-42f8-8342-14a4a42a6b32/tulebanusalovirasitexuxi.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/w/file/fetch/144943284/38346511338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67182bf7-f8a6-4465-a48b-f2eef649c9ac/wabatexapisojobujikirad.pdfIn PDF document text
    • http://tejudafo.pbworks.com/w/file/fetch/144460059/verbs_quiz_for_grade_2.pdfIn PDF document text
    • http://fepewuwakow.pbworks.com/w/file/fetch/144501993/24249949505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58351c13-45e6-4089-9e38-a986332754ce/what_size_are_sonic_drinks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc93edb9-61d0-4bec-816d-ddee8a8b06c4/las_chicas_de_alambre_in_english.pdfIn PDF document text
    • http://garifukedako.pbworks.com/w/file/fetch/144559722/what_is_ir_extender_cable_samsung_smart_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c6ec52-c213-4667-ba7b-aaa9f3a7957d/imr_powder_700x_load_data.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/f/legend_of_zelda_link_to_the_past_walkthrough_bunny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65440bcc-a694-4a21-9f31-c831e89ce863/77265664068.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/w/file/fetch/144458469/85424658112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e9ce587-fa7c-45a4-9e46-df6a003e83e4/jumunamafuwibidilokiwi.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 6476 bytes
SHA-256: 526c5a2175551476bef9e67e23fc16d118bda5f5d89964818a68e3a853678add
font_01_sfnt_off00010a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A95 5476 bytes
SHA-256: 04525b3cd9a441fe010d376f8def8c41d802bc706a8785b93140609b727eb99c
font_02_sfnt_off00011d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D11 3572 bytes
SHA-256: 638e6a07949591ba3a9120d4415b4a33405c61a50bc5b2906f9274d6cc8eab28
font_03_sfnt_off00012b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0B 12424 bytes
SHA-256: cd978d0c03b175886a25fc6dec1013ef6f7ebd2fe9cb6b9eb58e1d9345345753
font_04_sfnt_off000153cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153CF 16148 bytes
SHA-256: 676a6f9980301d650ad9b511319da6dac9fff4f77c228169d287e5253a078183