Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea5f3050f89ac7f…

MALICIOUS

PDF

78.6 KB Created: 2021-05-08 21:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 40306ffc70e596db87768532b8eac119 SHA-1: d2ff74da4407b74cbd88f60f3943c1542603fde7 SHA-256: aea5f3050f89ac7f15a8227987dbb589cd17155416637f75a7610a309694961f
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=penn+state+cloth+face+masks PDF link annotation
    • http://kmikaerfs.ru/my_ipod_nano_wont_switch_ondoqta.pdfIn PDF document text
    • https://cdn.sqhk.co/rorefevobo/exBvajd/bricks_breaker_balls_shooter_mod_apk_download.pdfIn PDF document text
    • http://suniduno.iblogger.org/lusoxevedezarezimi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473938/normal_602ad4df32ca8.pdfIn PDF document text
    • https://cdn.sqhk.co/zafazegig/cVf1jaQ/animated_love_images.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_6041fcdc3032e.pdfIn PDF document text
    • https://cdn.sqhk.co/romafime/RhdEhfy/xukogijavit.pdfIn PDF document text
    • http://labiosdewonda.com/55767858492n28i2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458837/normal_5fd12eea46a66.pdfIn PDF document text
    • https://cdn.sqhk.co/dirujigowag/hfPpOij/kenazogememenukowobikod.pdfIn PDF document text
    • http://dojaligiwojop.22web.org/a_level_physics_capacitors_notes.pdfIn PDF document text
    • http://vnds-super.space/59846555371utz7x.pdfIn PDF document text
    • http://gordei2d.com/758794248350plrm.pdfIn PDF document text
    • http://nonretloli.site/polka_dots_and_moonbeams_sheet_musicgxz8w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414159/normal_5fd7ecc115d00.pdfIn PDF document text
    • https://cdn.sqhk.co/refevebux/DibigWB/wolf_quest_2._7_free_download_demo.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/jehbK4C/vande_mataram_song_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://507f79ed-2408-4027-b124-45ed49bded7d.filesusr.com/ugd/2de61b_7f1bbfdcb5bd4c87abd7d3db5b9cea25.pdf?index=trueIn PDF document text
    • https://0ffdd24b-620b-4f4d-94ef-a39da1ca20bd.filesusr.com/ugd/853ce2_c164983bf598401c957d2d446da42e4f.pdf?index=trueIn PDF document text
    • http://puzasapexuwuju.epizy.com/free_dreamweaver_website_templates_cs6.pdfIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_d210cc2541b2438bb9c8b5ea1fd6476f.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
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BB 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 5092 bytes
SHA-256: aa5a68f99a79daea758c89aebfca00df7c763bdc74eafaee75190b14a7782f4a
font_02_sfnt_off000103d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 11692 bytes
SHA-256: 8e3ccade47558dba360c22b473520b5dce7b9c15dc0fc6038b218fe63dc4823b