Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa7e60d54917806…

MALICIOUS

PDF

79.1 KB Created: 2020-12-29 20:10:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5c39e3587ba88db4aa8cab978f720689 SHA-1: d4cff474335e23acfceacff4cc684c12b01f4bb3 SHA-256: 4aa7e60d54917806c8295abe25b643adc2d08f2d4f401e8c370b2932f90d3d8c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL suggesting a lure for downloading RPG software. The presence of a PDF link farm heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://trafficel.ru/strik?utm_term=dungeon+maker+rpg+free+download PDF link annotation
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/josox_mezatoxirev_wuvakixesavi.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/gRzific/fallout_shelter_pregnancy_wiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e533797-d672-4dc6-83ac-1f9668160408/rotipalitejanubew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4bdb67c-9cce-47ab-9b99-f2545ef363b5/terrarium_tv_premium_apk_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/sejawon.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/pewuguxupumubepogapotix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5101b8c5-c9fd-4cc4-8ea7-d15bfc65f389/knights_of_pythias_sword.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/sowozago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2297565-e187-4141-afca-e3a62f2ec7bd/89277051258.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/chicago_pd_episode_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/death_of_a_nation_download_movie.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/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC48A 2920 bytes
SHA-256: b0299174c4a503e320b47feb2076ca39d607fd604b7dbe3133fcbe6d226edb15
font_01_sfnt_off0000cee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE2 5340 bytes
SHA-256: ecc68b4e4ffb214547263ff452d6142657c6daa06a8c5126917d6f80de6464ed
font_02_sfnt_off0000e105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE105 6576 bytes
SHA-256: 6ad564eed0952122a8c76e640ba12a9a2e438d48c1b4fa07957a72e09f488e10
font_03_sfnt_off0000f274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF274 10600 bytes
SHA-256: eb3d0afc99d4096534d1592dff698d9292216c259ba790ee7aa743b27e389045
font_04_sfnt_off00011696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11696 17080 bytes
SHA-256: 9ffef205f36b46a3fec7eb6e27e5df4bf48f94f77ec64455e02b3e23eb04ed64

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