Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d20db8565a3e919…

MALICIOUS

PDF

69.3 KB Created: 2021-03-08 11:30:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8b0dd92936e7ad44908cf1f9537c8b6b SHA-1: 8dcd40ee430bf37f3868db06b0d6abf441c59b72 SHA-256: 1d20db8565a3e919ce295aa76bc9d53f15a333d548f1f63bf3912c8e08fe384b
184 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to be a lure related to a common household issue, suggesting a phishing or scam attempt. The presence of multiple links to disposable hosting further supports this, and the ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=top%20loader%20washing%20machine%20leaking%20water%20from%20bottom In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380230/normal_602c3210bb53c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_6013298368ff1.pdfIn PDF document text
    • http://gogejevi.iblogger.org/what_does_the_bible_say_about_feeling_empty.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451744/normal_5fd78e3fbd9b6.pdfIn PDF document text
    • http://betomererag.iblogger.org/susijugodotibolom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415742/normal_5fc932ba5fe97.pdfIn PDF document text
    • http://letekidela.iblogger.org/ableton_live_10_suite_free_windows.pdfIn PDF document text
    • http://rovosome.22web.org/lakasojekaguf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widabuve.epizy.com/15874079783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d40528-5e28-43bb-aec5-33b75dfb6a96/52229310002.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/pozonumajesokebugosurufom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63f12a68-cf0a-4a73-aedc-57c92a44710c/ludoluwewigef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa8f147-eafd-47b6-b210-d6adf251da32/cuisinart_convection_bread_maker_cbk-200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/490e22b1-b0d0-4a32-8547-68f137b7ae71/who_are_some_famous_greek_artists.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efac8510-ba94-4d05-b034-d63201c1bb0a/how_to_set_up_an_appointment_at_the_dmv_online_florida.pdfIn PDF document text
    • http://xadamodovupeniz.rf.gd/4012320615.pdfIn PDF document text
    • http://vapovalexuma.epizy.com/european_resuscitation_council_2018_guidelines.pdfIn PDF document text
    • http://komoxam.rf.gd/69034753910.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/solidworks_sheet_metal_drawing_show_bend_lines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db34f183-bb88-4615-a6c5-0b98f5a13f9c/why_is_the_online_light_on_my_xfinity_modem_not_blinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf6bdee-2d71-4fdf-852f-3649d95f03a7/monegetimupetixediv.pdfIn PDF document text
    • http://tokekiloxak.epizy.com/john_deere_310_backhoe_for_sale_new.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C4 5816 bytes
SHA-256: b371f15870c78e739da8be91d446c10dc30e81079c4d1b9e3954b36e365c0a2c
font_01_sfnt_off0000e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 10280 bytes
SHA-256: fcec63faeb52daa609b909dfa35095395fef8413936c11806e2735a8a52ca1fa