Malicious PDF — malware analysis report

Static analysis result for SHA-256 0248911e9958b0d3…

MALICIOUS

PDF

75.0 KB Created: 2021-03-08 11:06:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7dcdae0d7fed0afbfd1fb52ade6f692e SHA-1: b24d8a09da8bc5588cf371152a9fb350970ff97c SHA-256: 0248911e9958b0d3dabb38e9af97cb152557a12d650bde7e05431ffc9d9cf15e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/123?utm_term=instagram+ads+template+psd PDF link annotation
    • https://cdn.sqhk.co/ligumorik/iejfxhu/call_of_duty_cold_war_zombies_free.pdfIn PDF document text
    • https://cdn.sqhk.co/jogujufuza/e5gjieU/nails_near_me_open_right_now.pdfIn PDF document text
    • http://munoleriba.iblogger.org/begimajanademejibo.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/kapobibanevifedixifuker.pdfIn PDF document text
    • https://cdn.sqhk.co/wuravegaw/icgfBps/premium_cydia_apps_free.pdfIn PDF document text
    • http://jukomanafow.22web.org/bodyweight_training_back_pain.pdfIn PDF document text
    • https://vesanawe.weebly.com/uploads/1/3/4/6/134602832/lepagomesidekak_maluver_misijita_julit.pdfIn PDF document text
    • https://rajepejejema.weebly.com/uploads/1/3/4/8/134860913/8008098.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_6ff4042d516c48e5b6cdcaf6111e4c62.pdf?index=trueIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_d3a1f49c236c485ca480d3321a11396c.pdf?index=trueIn PDF document text
    • http://batapijas.myartsonline.com/6376077685.pdfIn PDF document text
    • http://nizofikunatafu.atwebpages.com/hunger_roxane_gay_free.pdfIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_0ab8db1c49cc47bd9e3e3ea259720454.pdf?index=trueIn PDF document text
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_f49b589a3e1f4742819eb81b04b2de69.pdf?index=trueIn PDF document text
    • https://1e2e1d2f-e5bc-406e-8ade-c93a3c5db6fe.filesusr.com/ugd/81c7be_0f78a003c34d4d00a10333f4d3e1a144.pdf?index=trueIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_38317e756161447c853646b1b21ab4bf.pdf?index=trueIn 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_off0000e86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86A 5216 bytes
SHA-256: 21bb25a5ebc633d714c67d745e0720d1ce2f9843cc14fef1718f3c75c4cdfe5b
font_01_sfnt_off0000fa13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA13 11008 bytes
SHA-256: c9820da248d93872bcbc6b191692cd35e41128f4ee11a6798db8d4aeb3d30f69

Open this report in the interactive analyzer, or submit your own file for analysis.