Malicious PDF — malware analysis report

Static analysis result for SHA-256 e069012a0d7cc720…

MALICIOUS

PDF

86.7 KB Created: 2021-03-08 23:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0cff1c8f2ba05056527ad1678c72262e SHA-1: 07f69cf821385252ceff9d114a909e0934fe099f SHA-256: e069012a0d7cc720077eeda5ceffbedaeefedcc3c98f0768befa10b544a7f6db
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded URLs, with one prominent URL suggesting a lure for a free VPN download. The presence of external URIs and link farm characteristics points towards a phishing or redirection scheme designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://leonvi.ru/123?utm_term=vpn+master++free+for+pc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419820/normal_5fd09b91d8248.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410015/normal_5ff4a96e4a382.pdfIn PDF document text
    • http://xonesasa.iblogger.org/khiladi_bengali_movie_hd_video.pdfIn PDF document text
    • http://nopisodozig.66ghz.com/towizosukawiv.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/80761566334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_601b5cbd00968.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/how_to_set_time_on_casio_wave_ceptor_4722.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454425/normal_5fdee3ddbc2ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/915cb807-7d8c-4539-ba0e-8665771a6c1c/what_was_alexander_the_great_accomplishments.pdfIn PDF document text
    • http://pitudug.epizy.com/mixovojojelosid.pdfIn PDF document text
    • http://wudazebej.atwebpages.com/3969767868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69b66ee8-9cb3-4f48-b29c-398027330905/bmw_navigator_7_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8e7e639-d4c2-4ddd-8f84-157a60d42c96/linigonupad.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/easy_way_to_play_f_bar_chord.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/alison_wonderland_peace.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/abyat_bahoo.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/voyage_charter_party_standard_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6918f2ea-486c-4bcb-b779-216d05c8a230/necchi_535fa_sewing_machine_repair.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_off0000e4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E5 6744 bytes
SHA-256: 8187145963fbf8e0b7977f93bb9cbfc296fb812f6e2b6f40a3c8d31ca5a797a4
font_01_sfnt_off0000f5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CC 5092 bytes
SHA-256: df7d3c08b60bd28854c344e09ebb691360bf02c5add9c69f38be81abd731978a
font_02_sfnt_off00010704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10704 4440 bytes
SHA-256: de9389e3c85eef856688fac6186c2c3f81b731a2d958c650cd787edcd75f1b2a
font_03_sfnt_off000112ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EC 10528 bytes
SHA-256: 70365818f3855d90c331b185e40108596a389a6900600a0ec13a739513282c70
font_04_sfnt_off00013742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13742 16164 bytes
SHA-256: 0646a63a478fe53468b8dbbe05b608d617a04836cde27f490c8d0ce00ae8a9f2