Malicious PDF — malware analysis report

Static analysis result for SHA-256 a11096b5244f5f8d…

MALICIOUS

PDF

86.0 KB Created: 2021-03-24 10:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 622d2a5f0fb6b71bbcddda91af6470e4 SHA-1: 261fe0358ab33833afe88990c4c1e33fa7fd9071 SHA-256: a11096b5244f5f8d786c89aa1a4f743df02391aeb96f8ac965b6f58ba2f44150
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a link farm designed for phishing or malware distribution. It contains numerous external links, including one pointing to 'https://nipisod.ru/strik?utm_term=percy+jackson+movies+streaming', which is likely a lure. The presence of multiple disposable domains and the ML classifier's high confidence score further support its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/strik?utm_term=percy+jackson+movies+streaming PDF link annotation
    • http://trastqort.online/bawalilufugefinikakiwesefghyjj.pdfIn PDF document text
    • https://luxaxila.weebly.com/uploads/1/3/0/8/130814132/163558ca61ca.pdfIn PDF document text
    • http://kujinatazema.sportsontheweb.net/how_do_i_pair_my_jlab_headphones_to_my_iphone.pdfIn PDF document text
    • http://alisaborodaenko.design/juwomosuzejadu1ac5.pdfIn PDF document text
    • http://teksalon.xyz/44836503058i3olt.pdfIn PDF document text
    • http://zivemigidefis.mypressonline.com/tigipomexemezumovur.pdfIn PDF document text
    • https://zigudufojivop.weebly.com/uploads/1/3/4/7/134718002/lasokagonukuz.pdfIn PDF document text
    • http://bapulesaj.mygamesonline.org/mama_ntilie.pdfIn PDF document text
    • http://usecabinets.xyz/gregarious_definition_vocabularygdk9q.pdfIn PDF document text
    • http://turistik-a.ru/attack_on_titan_game_ps4_youtubepv0m9.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/1d5babf6-3c7a-4638-8721-2c685efd487d/work_energy_and_power_questions_and_answers.pdfIn PDF document text
    • http://roxujewov.myartsonline.com/pathology_of_pneumonia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61390498-875c-4649-8392-145b929ee93a/45555019285.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_847d8970c3664671a7664729ddb77538.pdf?index=trueIn PDF document text
    • http://zewadomi.myartsonline.com/pressure_cooker_recipes_chicken_tortilla_soup.pdfIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_52ab100b012642a796fba62516b7cc2f.pdf?index=trueIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_e5f8760027ec46b28eb038dda91f4d65.pdf?index=trueIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_c1fe39f0932c4cad861395b24b70b35e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/90dc64b7-67f0-4409-b891-4bc748870e8d/soxederaw.pdfIn PDF document text
    • https://3926d074-74ab-41cc-aa9d-340192ccda4e.filesusr.com/ugd/5619e7_36cf9a523866444bb84cba8220bbd854.pdf?index=trueIn PDF document text
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_c1de32ae04df43c09ced6e9397ace44b.pdf?index=trueIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_530d646189fb4104bb5e1c261a1f99b1.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11344 5392 bytes
SHA-256: cd4f2f99ac22d292ec14affc954ed67ee3000ab17b1ed6a1f79c53d687adaa98
font_01_sfnt_off000125a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A0 10980 bytes
SHA-256: 69bd2d4038e138b3cbe1d388ecc115aa406acfd47d43b8584a1d98e704c90fbb