Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d03fe0c9dcba50…

MALICIOUS

PDF

79.2 KB Created: 2021-05-23 06:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e926a4a83d341b4f23043db19671937c SHA-1: 20f3de35fc02e120329c83d24f707cec0161a7f5 SHA-256: b1d03fe0c9dcba50c4fad22cb841d08261f4f8b8f7e972cd9b45a009f1fd5b01
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to 'fish philosophy', likely to disguise the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=what+is+the+meaning+of+fish+philosophy In PDF document text
    • https://bavexopifepixab.weebly.com/uploads/1/3/4/6/134683122/c912e47.pdfIn PDF document text
    • https://lixijuzi.weebly.com/uploads/1/3/4/6/134626773/a4d2c83700de2.pdfIn PDF document text
    • https://noloturajikule.weebly.com/uploads/1/3/4/4/134486045/b2eaf7f.pdfIn PDF document text
    • https://jerefukixuludew.weebly.com/uploads/1/3/4/6/134686450/d3ddd5b.pdfIn PDF document text
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/eddf679.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/ladiwuzetawedi/lewedikajimisemeboxorisez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c922e3a4-3f31-4779-9944-6e9f2a442ad0/2004_ford_focus_zx4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af94517c-5e1e-408f-b183-09760a1193a4/gezosemononitaxuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5489fa23-43a6-4605-9610-0276cfd02555/sri_vishnu_sahasranama_in_kannada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae0f64d-bffc-4067-a213-c6a468c0d8f5/chemistry_the_central_science_solutions_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/kefuwudilajiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9b9b72-d418-4a94-ad7b-1cc4f83f8b43/when_paraphrasing_text_it_is_most_important_to_romeo_and_juliet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec54600-edf9-4435-9840-a2c91e8c21b4/83190839967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c5c75c-8d3e-4ac3-ade8-d3565db68b81/66016858292.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/kijufesuruzinofofapejaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eb74183-b035-43d9-b580-eb784855f57c/webowijolaji.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/how_fast_do_dogs_go_into_rem_sleep.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/assamese_new_song_2019_djassam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea1cb09-1ae4-42a2-baae-490982704466/traduction_dun_document_anglais_en_franais_gratuit.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_off0000f8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B2 5332 bytes
SHA-256: 6f9e0eebab8c707c7ea6e1ad5a06dfb72b2eaeb6acc08047e899d3687a10bcb2
font_01_sfnt_off00010acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACD 10968 bytes
SHA-256: 009a71110c963888487115e70ec9889b800006c3c9e14788fe138afaddaf5afb

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