Malicious PDF — malware analysis report

Static analysis result for SHA-256 635d4d52d19ad528…

MALICIOUS

PDF

124.1 KB Created: 2021-03-22 03:10:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f5a10545000a51b5595241a2898eebc3 SHA-1: dd1000fc072b2764efa937f78d1448ac2134f061 SHA-256: 635d4d52d19ad5281053f2e83965a00c148ee97bbbf0d02c4dab0b2cbbfedfc0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to potentially harmful content.

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://maypoin.ru/award?keyword=spelling+dictionary+english+to+gujarati+pdf PDF link annotation
    • http://lajodibibodi.getenjoyment.net/el_pollo_loco_menu_san_antonio_tx.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/actividades_de_espaol_para_segundo_grado_de_primaria.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/dd_planescape_campaign_setting.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/volkswagen_touareg_2012_brochure.pdfIn PDF document text
    • https://gaxatibixowoki.weebly.com/uploads/1/3/1/4/131452935/3668769.pdfIn PDF document text
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/f86b4f8b96f8.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/kafesoloro.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/razer_blackwidow_ultimate_2012_switches.pdfIn PDF document text
    • http://funusamemis.22web.org/chapter_3_maths_class_11_download.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/69508692804.pdfIn PDF document text
    • https://dulipitigisol.weebly.com/uploads/1/3/4/7/134717891/bojepejekisuwip_lojogojinimiwe_fejurunit.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/lilurofepiguvo.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/inheritance_paolini_review.pdfIn PDF document text
    • http://rexuwoxaga.sportsontheweb.net/honda_eu2000i_2000_watt_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/broken_wings_sik_world_song.pdfIn PDF document text
    • http://widaxaruko.mypressonline.com/83375741395.pdfIn PDF document text
    • http://nexekeb.iblogger.org/33670966316.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_289a5ab4d1a641bcb6c953256fd6e4b9.pdf?index=trueIn PDF document text
    • https://598a1783-db1d-4ebb-96f5-d3ad23e1e090.filesusr.com/ugd/ae99eb_43b6f0b390624f8a8a2c70243d80e578.pdf?index=trueIn PDF document text
    • https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_db8b5b85f87b45008a863e738bd05091.pdf?index=trueIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_a43beaf7847c490cb65dc24a17d3ef13.pdf?index=trueIn PDF document text
    • http://tulifal.onlinewebshop.net/the_destruction_of_black_civilization_summary.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/what_does_soft_touch_person_mean.pdfIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_29a297c0de354f1c898e416bf2c98ad7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F78 5700 bytes
SHA-256: 03e9cfaf3eb784ade1384bf5befbeb216e0721dae23e2e44de052d76af622ba9
font_01_sfnt_off000182e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182E0 18836 bytes
SHA-256: 2ac3d7feac3b3ef339f61a5fae15ad5befc2809bae663d4c8dba0d3b06b05fea
font_02_sfnt_off0001bd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD12 10732 bytes
SHA-256: 8a45f9056e906ff11af17e24f13f1fa3049a241439d9b64791a9dee4224aa25a