Malicious PDF — malware analysis report

Static analysis result for SHA-256 0396e950b65ac648…

MALICIOUS

PDF

79.9 KB Created: 2021-04-29 19:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ac6dd55d4ea5b076c9c91508ba52b1d SHA-1: 2018922bb561d2e89a91337c0cb3ae17945be50d SHA-256: 0396e950b65ac64834eb95cabacd2416e1e00a3a63a58d6e1938f70b662fe2b7
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. The embedded URLs point to potentially malicious domains, indicating an attempt to redirect users to harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=elementary+school+printmaking+lesson+plans
    • https://nubazodakop.weebly.com/uploads/1/3/4/8/134850303/bogigufuwegij.pdf
    • https://cdn.sqhk.co/linidivez/hqujaic/warifivututavupokekeloro.pdf
    • https://cdn.sqhk.co/rutisifelom/idjcKju/alibaba_app_uptodown.pdf
    • https://diwamelebo.weebly.com/uploads/1/3/4/1/134108813/9696832.pdf
    • https://cdn.sqhk.co/nixafusoda/fPRwrig/cfo_job_description_resume.pdf
    • https://cdn.sqhk.co/pagupuxu/bL7higj/uc_browser_download_apps_free.pdf
    • https://cdn.sqhk.co/fevivesuxofo/bQPhigf/bird_feeder_plans_diy.pdf
    • https://susulipazelavig.weebly.com/uploads/1/3/5/3/135335994/4138366.pdf
    • https://cdn.sqhk.co/numavagoko/ibhciAf/41010957146.pdf
    • https://gibinefofagal.weebly.com/uploads/1/3/4/6/134668975/vufemat-gobolegas.pdf
    • https://cdn.sqhk.co/gagupibi/dhghcid/24471935668.pdf
    • https://cdn.sqhk.co/zewumirapeb/ao0W604/kelesumeviw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/abde7a59-6268-48b2-8034-37bee2bd4a4d/77918730415.pdf
    • https://uploads.strikinglycdn.com/files/a4278c9e-8e8f-4be3-8211-6093efbc0e4e/xupituramu.pdf
    • https://uploads.strikinglycdn.com/files/589e50da-8ebb-4557-a583-ed26cf81a9e5/65936127309.pdf
    • https://uploads.strikinglycdn.com/files/50e51776-32b5-44e0-a6d0-f545fa5c9a7e/tenuxisobanone.pdf
    • https://uploads.strikinglycdn.com/files/dc9513ac-d607-478a-a54d-40ee05f2da32/are_disney_doing_free_dining_in_2021.pdf
    • https://uploads.strikinglycdn.com/files/a7272aa0-3bd4-469a-b459-6419396e3144/54890379192.pdf
    • https://uploads.strikinglycdn.com/files/b2614d62-c8a4-4734-ad28-6da794dad796/what_is_qms_subwoofer.pdf
    • https://uploads.strikinglycdn.com/files/e749854a-1a32-4c29-b2c1-a6a3eabf1323/singer_futura_error_code_e1.pdf
    • https://uploads.strikinglycdn.com/files/ea3ffc45-2319-47d0-875c-1eb58496d40b/the_redemption_center_bennington_vt.pdf
    • https://uploads.strikinglycdn.com/files/be2301d0-7e23-4663-bf8e-b7db26dca9d2/how_to_mount_reloading_press_to_bench.pdf
    • https://uploads.strikinglycdn.com/files/86cf5780-39fe-40be-b369-b7031891f200/82445978043.pdf
    • https://uploads.strikinglycdn.com/files/4381f401-56df-44a0-8e29-3385a2096150/free_native_american_symbols_printables.pdf
    • https://uploads.strikinglycdn.com/files/7df0a323-d551-469f-a48f-57128ebffe30/what_are_the_missing_numbers_in_the_pattern_given_below.pdf
    • https://uploads.strikinglycdn.com/files/393c7e3c-ea4e-4b63-a553-37e08ed20896/tafubo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb2c.bin
ab8623a3aef4925caa2de07fd5ff25b036a9498ac9713cc6727dab350d9e14af
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2C 5468 bytes
font_01_sfnt_off00010da4.bin
80066f26ac53b41026e9d5eb2c2fcf45f206b437980343e5f1ae743906d86060
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA4 10452 bytes