Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ab86b1e8818845…

MALICIOUS

PDF

120.3 KB Created: 2021-03-28 02:38:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 36e77c7393160291732f6bbab4a6e667 SHA-1: 1f2ef1821189fc8fd5f9ae3fb2972052427de665 SHA-256: 40ab86b1e881884573d3a79053ab507413b9fcead389d14f0e0c75d80a68e019
156 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 0.9998

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
  • 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://zajinet.ru/wix?keyword=trail+of+tears+images+only PDF link annotation
    • http://neo-tp.ru/roots_prefix_and_suffix_worksheets209oy.pdfIn PDF document text
    • http://sudedelanefozuk.66ghz.com/android_studio_language_list.pdfIn PDF document text
    • http://xufunuduxatene.iblogger.org/anarkali_malayalam_movie_songs_free_starmusiq.pdfIn PDF document text
    • http://busibear.com/the_aeneid_sparknotes_book_2hopkr.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
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_ea193d2a66d74ab48364e772f95273f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/8660108742.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/brain_teasers_for_high_school.pdfIn PDF document text
    • http://vixoboguwexalo.rf.gd/commission_contract_template_australia.pdfIn PDF document text
    • https://0f424234-9c27-4462-a606-4b2ccecf17d8.filesusr.com/ugd/b42a09_a9838efa451a409ab0f0fef8e2fd7f3d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/zawgyi_unicode_font.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/graphql_android_app.pdfIn PDF document text
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_15f4275b666940c7b1dc3bf9aceadeaf.pdf?index=trueIn PDF document text
    • http://jatojitax.rf.gd/90106152912.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_ceb498d9df4445f2b67b548b2ffa61f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/legasijasurobakowikid.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/jotokenisefolalus.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/28967560844.pdfIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_4868a7a5bb4547069ea872141097b319.pdf?index=trueIn PDF document text
    • http://ruxogofirovudux.epizy.com/derivatives_of_e_and_ln_worksheet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E17 4928 bytes
SHA-256: e9e85077b9661d957eba47d31c1bc15be21cdca2549287ddc7d9b081ce3d920c
font_01_sfnt_off00019ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EBF 11436 bytes
SHA-256: ccca9c60c06ca34355f6cf3ebfc900ea9761602fa4b591b0d62e9b10ac11e998
font_02_sfnt_off0001c5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C5E3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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