Malicious PDF — malware analysis report

Static analysis result for SHA-256 099449e01e26f528…

MALICIOUS

PDF

81.8 KB Created: 2021-03-23 00:18:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 251c939534e0f1d0826b22b1406d246d SHA-1: 9617bd8f68a04998536eb8d81703b6db2686583f SHA-256: 099449e01e26f528ad2df9f4dea5c070c30a9f696a80f4013bd9e21261fac512
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or redirection attempt. The ML classifier also flagged this PDF with high confidence, supporting its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dafemum.ru/wix?keyword=royal+oaks+elementary+school+kannapolis+nc In PDF document text
    • http://gusevoxuzuwelap.mywebcommunity.org/america_the_story_of_us_heartland_fill_in_the_blank_answers.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/lededimaxugalirasifoja.pdfIn PDF document text
    • https://pasudavekeri.weebly.com/uploads/1/3/1/4/131437626/dadazu.pdfIn PDF document text
    • https://nifusesoporiw.weebly.com/uploads/1/3/5/3/135309858/mukixakego.pdfIn PDF document text
    • https://jalipixax.weebly.com/uploads/1/3/4/3/134340191/450250.pdfIn PDF document text
    • http://dujegud.getenjoyment.net/20392321210.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_7e3378db49a0481ab573d328c0b4539d.pdf?index=trueIn PDF document text
    • http://bidififi.rf.gd/6402505288.pdfIn PDF document text
    • http://muxajetolalet.epizy.com/16937301409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c48943-e6f6-49f5-8c5e-f675c373b248/bluebeam_revu_cost_australia.pdfIn PDF document text
    • http://xixesasix.epizy.com/delhi_metro_rail_map_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a559153-eaae-4a31-81a6-8787b40f23bc/wapodudizikabuzo.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_3ebdbc065a4b4730a56d1b8b5bc142aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa28642-98e1-46d3-955c-a234f3b13fa3/6113908462.pdfIn PDF document text
    • http://tokewaperomuveb.epizy.com/isosceles_and_equilateral_triangles_worksheet_4-_5.pdfIn PDF document text
    • http://xezerubewuxa.epizy.com/48429473970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e1dafb-5f44-4967-a55a-f19a64be3d62/giwovodovurulijojujezegin.pdfIn PDF document text
    • https://ede8a7a3-2377-4e09-926a-401222b31c25.filesusr.com/ugd/81c89d_08f7aac5fa494c3686072095fa2a7a11.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bf840c9-bedf-418d-a22a-d779694723ee/storyboard_artist_salary_california.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/35106812415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aae04d9f-eb26-4d88-845b-464c2c59372d/31073416818.pdfIn PDF document text
    • https://ad217471-f301-4d07-b05b-71cdb813ff8b.filesusr.com/ugd/4f915f_44db8f0e18c548408ef2e66ee0a4768e.pdf?index=trueIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_662a67df30284f16a739d92f5921fb18.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4C 5348 bytes
SHA-256: 3bd89eb03decac4319b72ecbe01a7e9d97057d619bdd7801749dcd67aba4c325
font_01_sfnt_off0000ff5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5E 10816 bytes
SHA-256: 5959ff09f59157118a8af123a51134e309d8cb6c3ef463af28699bd3bd0b7a58
font_02_sfnt_off00012498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12498 16076 bytes
SHA-256: a0852c4690a6c7c4be107c8faaea32186891696821b3a96aec1037a99786b2f1

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