Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a328eaa617f375…

MALICIOUS

PDF

80.3 KB Created: 2021-03-18 00:03:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b10a5914b271ba4d53f767d052439472 SHA-1: 5f3c7b07730ccf47bb3b4a2bd1ee2ed658ff6518 SHA-256: 30a328eaa617f3755bec35bd2e72997e4557ede34e116a5c146da10820e4bddb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant number pointing to disposable hosting and exhibiting characteristics of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://soxebez.ru/123?utm_term=date+formatter+template+ios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372987/normal_604994bc9476a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fe18734a1cfc.pdfIn PDF document text
    • https://cdn.sqhk.co/vurifozi/MN4hhwU/java_archive_1._6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391909/normal_6030768cea76f.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/j2yvjdL/warcraft_3_armies_of_azeroth_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391907/normal_5ffc8e1b4b376.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370989/normal_5fc6297d92eb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/77878a44-c128-4fd0-a115-d70d2b20d641/linksys_router_ea6500_manual.pdfIn PDF document text
    • http://fotafufoka.epizy.com/relabifuvererez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c52530-5582-45f5-bd9a-e7190bee83df/bi_ht_thiu_nhi_c_nh_u_yu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4b6376b-9836-4d3f-8f75-f5058382b1b1/60074345325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e4f6cd0-0886-4ef0-8a3d-19969f08c8c2/justice_smart_watch_will_not_turn_on.pdfIn PDF document text
    • http://bufurevufazan.epizy.com/wizib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc09ec9a-45ff-4914-bdc1-d755080b7f39/sledziona_u_psa_polozenie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dffef075-1add-40ba-9a36-3aa130d237a0/padotivafivujudipumi.pdfIn PDF document text
    • http://zenomidesedi.rf.gd/76479849551.pdfIn PDF document text
    • http://wereguvepowu.epizy.com/difference_between_android_version_7_and_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/255a5b20-f086-4681-97fe-750c9e9563de/is_the_book_in_a_dark_dark_wood_a_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c36e54b-9fb6-4525-8faf-78f99d404ea9/bojaluxunesazelutivogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/215f1fa6-ecdd-4e58-89fe-5a1cee6d08b4/percy_jackson_and_the_olympians_3_full_movie_in_hindi_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDB 4728 bytes
SHA-256: bf8498d30d019bc1e45b0d75a4e379885908d3d793982e423485b3e42386ffdd
font_01_sfnt_off0000fbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF0 13200 bytes
SHA-256: d7ccb747ac815d992c3028c2a0358e068c36b02d6fcf0878c9d24b2c2354312c
font_02_sfnt_off00012602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12602 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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