Malicious PDF — malware analysis report

Static analysis result for SHA-256 7202018b379c9a65…

MALICIOUS

PDF

93.7 KB Created: 2021-03-22 10:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e939f1de6be018f9def8be4858484952 SHA-1: 557d0f268cd6358751238ab2fde6c303658db469 SHA-256: 7202018b379c9a6516525e3076ac5a9c7794f260490199ffbe8af73c00601dbc
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 0.9991

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://gimoguvi.ru/award?keyword=bahrain+economy+pdf PDF link annotation
    • https://jejipabiximi.weebly.com/uploads/1/3/2/7/132741556/a8af65a.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/85632018198.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/89870800453.pdfIn PDF document text
    • https://sagojuxejuzogug.weebly.com/uploads/1/3/4/5/134598596/417ea1af4627.pdfIn PDF document text
    • http://itanto.space/datinigufosigitepidedejtpzyz.pdfIn PDF document text
    • http://liketime.fun/moto_g_3rd_gen_back_panelmrmvh.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/dark_souls_2_ps4_dlc_keys.pdfIn PDF document text
    • http://cmb-accueil.com/vibexosesuseruduzixegu6bu5m.pdfIn PDF document text
    • https://gikeviviku.weebly.com/uploads/1/3/4/7/134707445/8825713.pdfIn PDF document text
    • https://zopizegojuv.weebly.com/uploads/1/3/1/3/131380511/9421101.pdfIn PDF document text
    • http://gratoramm.website/we_zamyatin_best_translation56242.pdfIn PDF document text
    • https://rinixupikexem.weebly.com/uploads/1/3/4/0/134096042/4491671.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/24cd6f0e-86b9-4449-a78b-afc438accb73/red_and_white_led_christmas_lights_lowes.pdfIn PDF document text
    • http://jujobope.atwebpages.com/holes_essentials_of_human_anatomy_and_physiology_9th_edition_online_book.pdfIn PDF document text
    • http://lawiferow.myartsonline.com/porebitipixutor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/950e9b68-9401-411f-8cd2-45e95fa32e65/42312303103.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/noxejejokuduruge.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/authors_purpose_practice_worksheet_1.pdfIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_3fba3dc39382412e98d70d9a5422340a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/843ed8f3-800d-4101-81fe-28ad8b8ccea7/which_laser_printer_should_i_buy.pdfIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_4d0162846e1a4038a3f15ca134b39770.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a5b84a-5c85-4409-9f65-fbc701ecc0d9/oracle_11g_sql_developer_download.pdfIn PDF document text
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_c1adc5635ef94308b5647b370e045ed8.pdf?index=trueIn PDF document text
    • http://magegefopo.atwebpages.com/meruzokobuxibijaba.pdfIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_a236499748f94779a9f6c05c52ea1ab5.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9A 5336 bytes
SHA-256: f874c2b602cd9b2302881c86d6aebcc619e12893582c083f730349d01cadcb47
font_01_sfnt_off000140a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A6 11940 bytes
SHA-256: a0c37e526a856f3e18e1958d2399a13309305316d585ae259848c36d7554f14e