Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c45f1f0d225d91d…

MALICIOUS

PDF

128.5 KB Created: 2021-03-21 12:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 161908e978db18cf5056bb47722984af SHA-1: dd3f8c97b56122a07137fcaac0f0fa10d4f393ef SHA-256: 4c45f1f0d225d91d3425fbb306d4238f61a334d76f9564021a88c72784d2eaaa
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which are likely part of a link farm designed to direct users to potentially malicious websites. The document body, though heavily obfuscated, suggests a lure related to 'mapa provincia almeria pdf', which is used to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/award?keyword=mapa+provincia+almeria+pdf
    • https://pugefaguza.weebly.com/uploads/1/3/5/2/135299010/957ddd2f61e.pdf
    • http://reflectionss.space/defegosinetilowipizijuzoc76km.pdf
    • http://vpntop.info/ge_telephone_answering_machinejywv4.pdf
    • https://lanuwoga.weebly.com/uploads/1/3/1/6/131637333/e59e942e5.pdf
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/tejetu_tejigoterup_zudad_xufesujusu.pdf
    • http://vebafaguxaw.22web.org/estructura_de_los_textos_argumentativos_ejemplos.pdf
    • http://sweetmeet.online/japejufuet2dm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://volenivojox.epizy.com/arbonne_30_day_challenge_food_list.pdf
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_3e58692cee8d4c11b291c63f7fd170f1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/06483d23-2629-4689-a2cc-8432535b39fc/the_missing_season_1_episode_1.pdf
    • http://nozuwodapa.epizy.com/78440302821.pdf
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_35f3f01046774eb190fae077c58361cb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8ed12ae2-ec14-473a-bd44-10a2e0b058de/65052375556.pdf
    • http://magivaxinel.rf.gd/movies_hd_apk_for_ios.pdf
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_695cd2e6301b4a709ba27ad5f1a385c3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b6ceb878-4e89-45b9-ab75-b20bc6a8f08b/latitude_e6410_touchpad_driver_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/e1d843d4-c186-4d42-99f0-0171275ed233/kindergarten_math_addition_worksheets_free.pdf
    • https://uploads.strikinglycdn.com/files/e9b9f2f0-85a8-4feb-8ddd-8bcf8f91a951/1990599744.pdf
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_a99cea9e32104bfea09c4fa5c4b3bddd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a153352c-609c-457d-b977-a55cd4038484/32401877701.pdf
    • http://xugeseza.epizy.com/what_is_onenote_2013.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_off0001b55d.bin
2dd035d0cc624827d7f1d6e12a6ef1ec5ee15bf11efd209d22023a23f1d56417		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B55D 5188 bytes
font_01_sfnt_off0001c702.bin
5a945ef67fea03497b1c98fe1a022b095f98f2b625e0b937ebc19fe4cba1eae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C702 13688 bytes

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