Malicious PDF — malware analysis report

Static analysis result for SHA-256 31a00662b4c0e092…

MALICIOUS

PDF

87.4 KB Created: 2021-03-17 16:06:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f51cea0519dd862fe349b84d0f95f81a SHA-1: 25bdbf8afe541e5a5909ea9dfcfeeeab886f5445 SHA-256: 31a00662b4c0e09293fcaa6f447d4d04e5f4858554544fbed0b776ee48ce4f6a
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple critical heuristics as a malicious redirector and link farm. It contains numerous links to external PDFs hosted on disposable domains, suggesting an attempt to lure users to malicious content. The ML classifier and ClamAV also identified it as malicious, likely phishing or a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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 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.
  • 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=help+thanks+wow+pdf In PDF document text
    • http://vajesafosedepur.mywebcommunity.org/jiwupugotasogowubep.pdfIn PDF document text
    • http://chestlune.online/zakovoxifigajuzqyzq2.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/the_lady_or_the_tiger_short_ending.pdfIn PDF document text
    • https://nojokuvevufig.weebly.com/uploads/1/3/4/1/134109253/bd5149608ed.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/paxaliwabimoribilis.pdfIn PDF document text
    • http://kalukawuwo.mygamesonline.org/72538510664.pdfIn PDF document text
    • http://sutivetowit.mypressonline.com/97763681679.pdfIn PDF document text
    • https://firedilem.weebly.com/uploads/1/3/1/4/131407958/9983f2aaf8a.pdfIn PDF document text
    • http://foselosen.sportsontheweb.net/.pdfIn PDF document text
    • http://mylevel.store/xijusl7c0w.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://8f1c0ae7-1ba6-4c51-a623-4d29f5e3aebb.filesusr.com/ugd/c1615c_b2b7fd7fa28a47ef98d2c9a65815d91a.pdf?index=trueIn PDF document text
    • http://pimobepetokonud.myartsonline.com/36680680547.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_90ae37c260ea41b98f1162b2c413f1e0.pdf?index=trueIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_c744f2a6baae4266aaeede5e0bdab549.pdf?index=trueIn PDF document text
    • http://pekamidakoj.atwebpages.com/63427508889.pdfIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_5c3b5f7b452e439d8b9d0daeb08734e2.pdf?index=trueIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_d38d2efa66a54326b3fc7c58b070a60f.pdf?index=trueIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_427f5c75bb3045e6b2816f20b363255c.pdf?index=trueIn PDF document text
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_0464f036ad6a4cfe8cbdba3411ad655a.pdf?index=trueIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_c1fbc52c59de410bbaf19069dcf5677e.pdf?index=trueIn PDF document text
    • http://pozidijapepore.atwebpages.com/kitejegimifubidowexotir.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_262a45b4bea94a8db61a3a46fdcfdb2e.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA5 3360 bytes
SHA-256: 1ca6183bc631e8b89b4e928413ae5c5a6397c9d5d404403ff478a800fcce4f00
font_01_sfnt_off0001089c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089C 4892 bytes
SHA-256: 68caa13ea535cc17c5c0dc2f401d7a5e83040d6f7edccbf4edcdfa737470c4a9
font_02_sfnt_off00011948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11948 12472 bytes
SHA-256: 6a9bc2d2dcff25131eeaee38edc2a09ee73de2eb354232864460756436799023
font_03_sfnt_off00014211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14211 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.