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)
MD5: f5a10545000a51b5595241a2898eebc3 SHA-1: dd1000fc072b2764efa937f78d1448ac2134f061 SHA-256: 635d4d52d19ad5281053f2e83965a00c148ee97bbbf0d02c4dab0b2cbbfedfc0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the heuristic PDF_SEO_LINK_FARM suggest the document is designed to redirect users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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

Files carved from inside the sample during analysis.

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

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