Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0da6c869e4fd70f…

MALICIOUS

PDF

92.9 KB Created: 2021-06-05 09:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9388b0258d936286ef202ffe2e7c79f5 SHA-1: d41a8aba8edd9ea91a26946417dc1dd37e60718c SHA-256: a0da6c869e4fd70fbcf91dfcbce97962d231c7c5350804ce193a0ba39a086599
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://jumiwimov.ru/123?utm_term=mod+aether+para+minecraft+pe PDF link annotation
    • https://wapaberupuz.weebly.com/uploads/1/3/5/3/135397773/tutomobir.pdfIn PDF document text
    • https://jasugigikimodo.weebly.com/uploads/1/3/1/3/131383258/gabono_vexubibalenivuk.pdfIn PDF document text
    • https://mipijipibax.weebly.com/uploads/1/3/4/8/134873473/jemef.pdfIn PDF document text
    • https://wotafoxig.weebly.com/uploads/1/3/4/3/134306194/6612380.pdfIn PDF document text
    • https://kotogafisix.weebly.com/uploads/1/3/0/7/130740127/ce8242.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb72c9b-5d2a-4f5c-a5e8-29c12160c15a/tomabanifubesotodirewofi.pdfIn PDF document text
    • http://nidibewuzi.pbworks.com/f/how_to_weave_a_basket_easy.pdfIn PDF document text
    • http://tufukamapaf.pbworks.com/w/file/fetch/144528525/hotels_near_me_with_pool_in_room.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6966420-5636-4301-af34-64550e175dfd/3_month_old_milestones_babycenter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/850a5f6a-1d2a-4120-9606-51b6f493059d/16587516475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfeefe7-8f52-426b-b91c-e6df797d29ff/desixuvorijo.pdfIn PDF document text
    • http://xesimisejek.pbworks.com/f/porugikusaloxatowonif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2992097b-d60e-4f95-9c76-f4374ebea03e/26786728712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2a0242f-e718-4233-946c-de6d3c18a6ab/john_maxwell_developing_the_leader_within_you_2.0_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c371a9-9916-4cce-b218-66730044ac5d/how_much_is_the_a10e.pdfIn PDF document text
    • http://pojaweku.pbworks.com/f/herkl_efsane_balyor_2_trke_dublaj_izle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b4712d-4ae5-4f71-84e6-0dfb040b8cd1/pafenobejuligopijufobeda.pdfIn PDF document text
    • http://giwupiraride.pbworks.com/w/file/fetch/144633384/rujososepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c9ca894-6412-4281-afdb-3450b40a3148/how_soon_did_you_fall_in_love_reddit.pdfIn PDF document text
    • http://fujiserefi.pbworks.com/f/raypak_heater_water_sw_open_error_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f82a6f-1b18-44c1-9c2a-e02dccd49cad/zogajelatapakaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb34666-3384-42d1-a4b7-76df893ede60/richard_iii_act_1_scene_1_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c966795-900e-4463-935a-0a508aefe938/how_much_does_a_criminal_lawyer_make_in_chicago.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001290a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290A 5192 bytes
SHA-256: 0a81f012625c966fa5ae5de2c1a8e79018be98b5fec87044d46055a52f496cc9
font_01_sfnt_off00013a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9B 13344 bytes
SHA-256: bdb6664ecb51585b23c2eb5ded33d6ae5ee1810cbfa22f95ac92d372649062e9

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