Malicious PDF — malware analysis report

Static analysis result for SHA-256 597e307963b63f32…

MALICIOUS

PDF

75.0 KB Created: 2021-03-25 18:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cf44a1006013a21f6b86372cc1ea2947 SHA-1: 50d69868ccc7150d18076a2cae113140567931dc SHA-256: 597e307963b63f32afe849d16ebdfb15ad7b7a32c0b4e9ac45e953d7bd3fcb73
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://xajibur.ru/aws?utm_term=how+to+tighten+chain+on+husqvarna+460+rancher PDF link annotation
    • http://zigapajuxijado.mywebcommunity.org/tikijanotinufimubugomara.pdfIn PDF document text
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/8512050.pdfIn PDF document text
    • http://lezobul.medianewsonline.com/vusuzetewilotosilo.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/encyclopedia_of_flowers_with_pictures.pdfIn PDF document text
    • http://zivudib.66ghz.com/satyanarayana_biochemistry_textbook.pdfIn PDF document text
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/galokujitopit-xevima-fumegefativazik.pdfIn PDF document text
    • http://waparudadip.mywebcommunity.org/bebativ.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bezukovopobav.epizy.com/ali_g_indahouse_full_movie.pdfIn PDF document text
    • http://xokilovemu.rf.gd/homer_iliad_book_1_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74625fe2-449b-42e8-851a-8bbba193c24b/3650009026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363a1a47-30d5-4baf-858d-190516d294b3/bujotulemedizowafop.pdfIn PDF document text
    • http://zoforex.rf.gd/kejoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32a1b5af-ea8a-41fa-90cc-f69e98dfbfa3/xikuzujoguwofuset.pdfIn PDF document text
    • http://jilabof.epizy.com/93946866395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2bc7ad6-3bcb-466b-9f82-85d850686a6c/how_to_find_a_stock_symbol.pdfIn PDF document text
    • http://wubuxosivukip.epizy.com/61453963218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ceabd82-b9d3-44a7-bbf0-4c838aef859c/69233314222.pdfIn PDF document text
    • http://ferodibev.onlinewebshop.net/argan_el_arte_moderno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae18a8e-d5d7-45d1-a2d5-8f4f675aba8c/jesus_at_the_center_chords_key_of_f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD913 5532 bytes
SHA-256: cbb5e65b98aa40a0e96ac8288740181c2767502c3ec0732f21355649b32278ca
font_01_sfnt_off0000ebfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 10644 bytes
SHA-256: 39b1851e79c8256ca48f3559cc35e5cd29c439cbce48a461cd4254e2a15069d9
font_02_sfnt_off0001101b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101B 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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