Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bedf818fa30ad63…

MALICIOUS

PDF

79.8 KB Created: 2021-03-20 18:02:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1f3cab1bdd0c513f4b2da16e011a0e77 SHA-1: c038894797abe456ae3283635926b1be15652419 SHA-256: 9bedf818fa30ad63e43afe638fc42bd4c421d1f1610a4883e0bf2428deeed26b
126 Risk Score

Malware Insights

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

The file is a PDF containing embedded URLs, with one prominent URL identified as a potential lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The presence of multiple external URIs and a link farm heuristic further supports the attack pattern of directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=long+live+the+princess+guide+0.18 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485821/normal_5fe8763201d7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464056/normal_6021ee1ce8019.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/89720067011.pdfIn PDF document text
    • http://kedepoba.sportsontheweb.net/zodomilafafim.pdfIn PDF document text
    • http://bukuminuwakub.mypressonline.com/ripley_s_believe_it_or_not_facts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472221/normal_5ff2ba598c147.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dojagosixotebut.rf.gd/bajrangi_bhaijaan_songs_djmaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8472133a-e744-4990-a2c8-224e613f8d14/pathfinder_roleplaying_game_adventurers_guide.pdfIn PDF document text
    • http://dijimati.rf.gd/oraciones_en_ingles_con_verbos_irregulares_en_presente_pasado_y_participio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae82d57-cb46-439a-83de-162c6b0c8f56/bemutukelakakegowuw.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_97cf9988857d435f98e6fd4a70d65fc0.pdf?index=trueIn PDF document text
    • http://zibelasavu.atwebpages.com/80020932189.pdfIn PDF document text
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_1aef9d73ca5e4970b970757d2bcdec52.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorogamat/hampton_bay_ceiling_fan_light_bulb_change.pdfIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_bde2346061d9432c84bd3856c2486373.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f870caeb-3988-4038-9297-510761632b1e/how_much_is_disney_california_adventure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f74e0c9-7254-40cd-9f52-1015ec3c05a6/2008_dodge_avenger_computer_location.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/gefagitegikivejumubuwawu.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_off0000efc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC3 5544 bytes
SHA-256: d49f7e1012c63eba641fcefb039987e5ab70c768f64410579f7cb56976413f58
font_01_sfnt_off000102b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B0 2044 bytes
SHA-256: 7819ef1de3348ad227e302ba7a5900f372fd4440a21f482bbf68fb1bc67eb97d
font_02_sfnt_off00010c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1D 11016 bytes
SHA-256: 52835eae81f0dce73454a7f040269f1e727f062c9760659842d812ae005a7ee5