Malicious PDF — malware analysis report

Static analysis result for SHA-256 011e92790e8388fd…

MALICIOUS

PDF

81.0 KB Created: 2021-05-23 13:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 81b12d4356c0036ad1ee7da106cc3519 SHA-1: eaff4fbcdd7442145e955f8159c32d1b3257112b SHA-256: 011e92790e8388fdec85dcd23d281669be1e0dbf83766861ec32fd2a522c01e7
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to suspicious domains, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • 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://xezojetit.ru/strik?utm_term=do+pal+ruka+mp3+download+songs.pk PDF link annotation
    • https://libidipoxojab.weebly.com/uploads/1/3/5/9/135981854/8206688.pdfIn PDF document text
    • https://mufewikusa.weebly.com/uploads/1/3/4/0/134042586/jugufujewegopapi.pdfIn PDF document text
    • https://birifebirox.weebly.com/uploads/1/3/3/9/133999865/2221928.pdfIn PDF document text
    • https://gulivogafiwimu.weebly.com/uploads/1/3/4/7/134746454/fuzufezugubokeb_vetuxuk_jefakefan_golawoxawas.pdfIn PDF document text
    • https://puzujesojanigo.weebly.com/uploads/1/3/4/5/134504435/a6548cf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b47855-e3db-471c-ac19-64447b09ec53/anthony_de_mello_books_the_way_to_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a75f1df-4b0e-4516-ba85-6041c0b39b00/how_to_know_if_your_baby_has_developmental_delays.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91323130-6be6-41cb-8990-7d1350958c7d/bacb_5th_edition_task_list_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4274ce3f-8141-48e3-80e2-5655a88e98c7/24261411262.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/feridubitonisetotopuzil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6901f24d-dfad-493c-b278-980124c5a0ab/78308395433.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/sumaxotakelatepim.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/invention_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbec0235-e172-47fe-89a9-a998221c7d6e/how_to_pair_plantronics_headset_c054a.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/21244783141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d47275-211f-439d-9158-55ae4ce92339/wd_my_cloud_mirror_manuale_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/three_examples_of_spreadsheet_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b531b5fa-c179-43eb-8cb4-844c130d5eaa/ice_fishing_lures_for_lake_trout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b64445-9906-4abd-aef7-0ff071093b4f/why_does_my_vivitar_speaker_keep_beeping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c6decb-63ca-4df0-bd96-fa1dcc349bf8/32811209413.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/capable_to_perform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a09318c-8cdf-46f3-a454-aa0adb233adc/mainstays_bathroom_space_saver_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/19159827340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3cdd063-7eee-4321-bfd1-15182f8a51a4/92089966201.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/lapigekuvoxodekuvajowa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE60 5632 bytes
SHA-256: 0b0647223996d0cacf180669016d30b745a48096ab516990d23e6db70be4824a
font_01_sfnt_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 10760 bytes
SHA-256: 74136d7d1e7a0aea4fe450b0f53457f2e993ef966896779f0bfc8b6588e1604f
font_02_sfnt_off00011676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11676 18776 bytes
SHA-256: dabf0ccc451caf4864c9b22ca91318a92e8f625b469dd0561edf59b451c7a792