Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ad0e0ee34f9502…

MALICIOUS

PDF

82.0 KB Created: 2021-03-12 15:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3a495b14f341a239fc25ebf92aff8e34 SHA-1: 5411db91a1c9a92669fbad138873772e8ea44642 SHA-256: 56ad0e0ee34f9502954d76ec0df985b2c35d3cfac196c56c3c39e67f46ceed5b
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 0.9957

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/strik?utm_term=love+languages+list PDF link annotation
    • https://vigofamuzozovi.weebly.com/uploads/1/3/4/6/134671609/b7a0adfde2f.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/ligaxokewaregu-dafexodugogig-xoxojuwakew.pdfIn PDF document text
    • https://vigodozoxofi.weebly.com/uploads/1/3/4/5/134599787/derapujopexef.pdfIn PDF document text
    • https://ralerafuzirepob.weebly.com/uploads/1/3/4/3/134386916/xenulilufepop.pdfIn PDF document text
    • https://juzasofudabin.weebly.com/uploads/1/3/0/7/130775050/6489194.pdfIn PDF document text
    • https://midejunefe.weebly.com/uploads/1/3/5/4/135400465/6636180.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/m._butterfly_by_david_henry_hwang.pdfIn PDF document text
    • https://zaruteso.weebly.com/uploads/1/3/4/7/134716260/4686130.pdfIn PDF document text
    • http://pifofobexaxel.mypressonline.com/84744193563.pdfIn PDF document text
    • https://rilirali.weebly.com/uploads/1/3/4/2/134235358/3dc4bedd.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/juxobotelexito.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vajefam/check_register_practice_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1405cc61-2732-453a-bd93-7c1ff1721e5d/how_to_replace_car_alarm_remote_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/final_cut_pro_picture_slideshow_template.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/why_is_my_bunny_changing_colors.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/angry_birds_transformers_list_of_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69653b68-ce66-4a28-9b70-852889ee016c/tokyo_ghoul_season_3_opening_1_hour.pdfIn PDF document text
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_398d818e6f1242bf8ca328ad7796dc55.pdf?index=trueIn PDF document text
    • https://42172c5f-463d-425f-bc49-3536d5e9b788.filesusr.com/ugd/3e9aab_4010c6007e8c443c97584691936ba724.pdf?index=trueIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/lukas_graham_7_years_old_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bad6089-52cc-409b-a971-65dafb3c67e3/how_to_clean_coffee_maker_with_descaling_solution.pdfIn PDF document text
    • https://18d8f76e-0bdd-4b96-b744-fee987eed1b0.filesusr.com/ugd/1486c8_fcfdd55eab2f4f6faaba1764ac0bb369.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/38551273165.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_d9ba3f5eb6654f1dbe43b34389615ef0.pdf?index=trueIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_e2f4277c1b174cee9bcc5a12e878de11.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f6fd798-c2ba-4c0b-90c4-7b12b08ee2b1/what_is_meant_by_resource_curse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd367eb-530f-4d9c-af1f-f0749a556fea/the_word_of_god_is_living_and_active_bible_verse.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B0 4756 bytes
SHA-256: 11c51b1c42233f3c185118e9e9c8fe9c72fb6f74e8882e17e2b6388514afd459
font_01_sfnt_off000112ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FF 11268 bytes
SHA-256: fce9e0c684d225388498510d981e198619641639f8f193bec44a25ab28b2e9f3