Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3870af82fc2852d…

MALICIOUS

PDF

107.9 KB Created: 2021-03-09 09:38:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 81e26c19a08bdacc25c1e326c1b6dae5 SHA-1: ff93b5bf5644f835b4294f3dc450749f15168a5c SHA-256: b3870af82fc2852d822851fb181c372be80a5957bee7a8a685ca00c90e5b3eb4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF documents, indicating a link farm or SEO abuse tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/wix?keyword=warren+wiersbe+bible+study+series+pdf PDF link annotation
    • https://cdn.sqhk.co/pajokiman/bgQhhMd/ribud.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/6665957.pdfIn PDF document text
    • https://nasoxatexiwek.weebly.com/uploads/1/3/0/7/130739087/gevosejumixutiworeve.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/96242.pdfIn PDF document text
    • https://folutiniku.weebly.com/uploads/1/3/1/8/131871586/6065990.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/WTAjaXc/58614624272.pdfIn PDF document text
    • https://zavodazokexa.weebly.com/uploads/1/3/4/6/134632977/morudisemeduteduk.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/j2icihL/bolor.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/15406252.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
    • http://roluvad.epizy.com/corsair_k95_rgb_platinum_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/691d5b8e-c228-4e2d-b92c-a7729269f079/the_shadow_rising_cover_art.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/video_dari_facebook_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/woolworths_online_application_form_for_a_job.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/zogapusubefuvukurured.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e827ea3b-0c59-4584-8579-74dd8e2c9728/how_to_breed_eevee.pdfIn PDF document text
    • http://nuxidewoti.epizy.com/38372654676.pdfIn PDF document text
    • http://puzuzebud.epizy.com/94256585107.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/fungsi_ambient_display_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/84416837424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c80f7e2a-3851-4b3b-b6ed-5b87576f3833/the_twilight_saga_breaking_dawn_part_2_soundtrack_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1759874-1fb9-4e21-a06a-7f1f3655b24d/cen_tech_battery_charger_quit_working.pdfIn PDF document text
    • http://lolufijufafoz.rf.gd/nikon_coolpix_p510_bridge_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbda38e3-afd2-4bb2-aec3-7f64b85b191a/heroes_of_olympus_movie_release_date.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_off00015e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E4D 5156 bytes
SHA-256: 5b612221da18595eb7e0080776229d72595466bb2735b541ed00b9856c8f46e1
font_01_sfnt_off00016fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FEA 10404 bytes
SHA-256: bbce943b4a6a2a1481acb2a7e340d5a22414e830802f7a5675abf6e119585c10
font_02_sfnt_off0001935c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1935C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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