Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9e4c7379903dfd…

MALICIOUS

PDF

164.8 KB Created: 2021-02-05 06:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9fa01b9c0b081018cfe3a1e22975f2b1 SHA-1: dcd7df0b004fec561f2b813b23f2d7d672f2b3b6 SHA-256: ba9e4c7379903dfd9f11cb610b223930ddc4bdbb2d947dcbcd2f08245161515c
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to 'comic book template psd' and 'wkhtmltopdf', suggesting a lure to a malicious website. The numerous embedded URLs, many pointing to disposable hosting, reinforce the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crophysi.ru/aws?utm_term=comic+book+template+psd In PDF document text
    • https://cdn.sqhk.co/rinulazopun/pok0Qif/world_war_polygon_ww2_shooter_mod_money.pdfIn PDF document text
    • http://henrysavbr.site/walter_isaacson_da_vinci_freesy8ed.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/tjhhcii/loniw.pdfIn PDF document text
    • http://vuwobide.22web.org/sage_chart_of_accounts_template.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/gYkhejb/61849699216.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/the_karate_kid_movie_songs_pagalworldrevqe.pdfIn PDF document text
    • http://fb-ig-violation.com/tujuwtgkk9.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/gbwC6ic/48555564148.pdfIn PDF document text
    • http://ogranifruit.space/subordinating_conjunctions_worksheets_with_answer_keywppwn.pdfIn PDF document text
    • http://atomyimperial.ru/star_wars_imperial_assault_guideuzpsf.pdfIn PDF document text
    • http://armada.technology/communication_skills_word_searcht3yf2.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/bHaihia/vawazewovimom.pdfIn PDF document text
    • http://fruct.space/32238195653upxjg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://foxorefo.epizy.com/chefsteps_joule_sous_vide_manual.pdfIn PDF document text
    • http://jilagikudi.rf.gd/74524749340.pdfIn PDF document text
    • http://degepedafapuf.epizy.com/jonah_hex_imdb_parents_guide.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
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00012af9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12AF9 76448 bytes
SHA-256: b933442001773b11d109304ae895f77ac5980d4040bd63ae6b4a4345b527f5c3
font_01_sfnt_off00020ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20EC7 5232 bytes
SHA-256: 5087dde6237596cfeed3c11ba5efc181b46713e310d09d3fa45bab7394f15ad7
font_02_sfnt_off00022080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22080 8788 bytes
SHA-256: 69d0014fe085c506a00dbf2a516a7f3032c2c5f580808271b8871ec32a8cbab1
font_03_sfnt_off0002319a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2319A 2096 bytes
SHA-256: 4a72ede76840ea1f71ecd783ddc2820a022560b2b9b1d84beb7eef4022711b9b
font_04_sfnt_off00023ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23AB3 13516 bytes
SHA-256: 1c679925387033b3563ecca5e40a8777ae659eab117d67fa4f2430991677a6f6
font_05_sfnt_off000265e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x265E7 18400 bytes
SHA-256: 1eaba9e0f8ab3eb6827a3a5b0cf798c8b01dd5ea261c189649cce7d2ab05e2fa