Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cc66a8bb34e72b…

MALICIOUS

PDF

83.9 KB Created: 2021-03-31 04:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b1722485ddfd3414edcad75100f9429f SHA-1: 4b26a0293e1d4cbc0de6ebbfb4dad19c50ad68d5 SHA-256: 80cc66a8bb34e72b270f7d64f7183f0cf32db3cb6e363c04e9d90360aa754ae2
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URL points to a domain that appears to be part of a link farm designed to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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 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://jottigo.ru/wix?keyword=cabrillo+college+google+maps PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412403/normal_5fe43188397be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_605d265759b25.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/ahMjiig/rusivugekegudidiwekuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487431/normal_5fdad425b46d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386363/normal_5ff95f6df132f.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/2jiwgc3/tepugojazax.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/jjhfZSW/58667118901.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/3kjjALa/trial_balance_example_accounting_coach.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/FFhhggH/vidstatus_app_download_jio_phone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_6046dcfc2e38f.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
    • https://uploads.strikinglycdn.com/files/3661569d-2363-4b1b-984f-3c3bcbe39d37/jukukixegodepikigun.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/peneluxawavazizig.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/sscnr._net._in_answer_key_2019_mts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2409dad1-90d7-4bb3-9a49-692531513e59/vermeer_bc1000xl_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c82fa7e-1511-4254-a9ba-19035557ea1f/asrock_z97_pro3_cpu_support.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d997fdc-ec94-499d-9bee-a09e355212fb/lijufiluvemapeg.pdfIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_d87d85e2d4184c96b0e7c2079730ccf2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f2c71e0-9f12-4da3-82f3-03e9e7cf3cb2/are_stock_markets_closed_today_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23458d86-ef70-419d-bea3-8ab304bc7a01/oracle_sql_and_pl_sql_performance_tuning.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_9da24ff3c90d401583fd032012bd39c2.pdf?index=trueIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_9751775e79e04ed68d576c47b21528cd.pdf?index=trueIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_0837d28a838c45fa8a9da3cec210617b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxelula/netflix_android_stop_autoplay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/875118c3-b06d-4ab8-95b1-8f39620bc916/13744194640.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/english_movies_free_2017.pdfIn PDF document text
    • https://183cab0c-2e2b-44e6-b55a-0f82cb58e578.filesusr.com/ugd/133137_33c50b3379f44adbac721282855e2808.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosevud/bosch_door_and_jamb_hinge_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e0276b-5cda-405a-8992-65518052d81a/english_grammar_book_for_ssc_cgl_download.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_off0000fd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD80 5016 bytes
SHA-256: de55b83467964c0504dbabd0a000b22090699691ad7c759b2075fa07324c3d34
font_01_sfnt_off00010e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E87 10772 bytes
SHA-256: 7e8f6c5d08ea0ba15b302905da805a57f76b98994bbbdebe9adf7b36a53d7820
font_02_sfnt_off0001334e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c