Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20b6c25bcdd071a…

MALICIOUS

PDF

94.0 KB Created: 2021-04-01 21:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 60d9de90f53d249850090902926fdc43 SHA-1: 73449efdedce659e4cff551a4d6b4c6b46c8b1be SHA-256: d20b6c25bcdd071a0e60fa0588958fac36cb62ac625d609cbca196d725a5b114
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a potential lure to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, suggests a deceptive pretext related to a table or document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 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://jottigo.ru/wix?keyword=tabela+camex+2020 PDF link annotation
    • http://zuluwana.iblogger.org/captivate_us_watermark_performance_track.pdfIn PDF document text
    • http://penarakagadek.22web.org/how_to_teach_prepositions_esl_adults.pdfIn PDF document text
    • http://moneymaya.site/phrasal_verbs_in_english_grammar9pucg.pdfIn PDF document text
    • http://lighterusb24.site/cajas_de_carton_bookm2434.pdfIn PDF document text
    • http://goods-amzon.com/the_secret_garden_movie_cast_2020sx4ok.pdfIn PDF document text
    • http://all-host.site/101012099722jq8s.pdfIn PDF document text
    • http://kawlites.online/xuronuvelulonunavevobejef1e0s7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_c8917a941fc042aa8588b5ca674113de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/11541677514.pdfIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_3fd718c4ea8a4f98b27f5ba9ecf16d80.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b83fd27-f428-454a-8983-060d2c95e7d7/30288953751.pdfIn PDF document text
    • http://fomigidaxek.epizy.com/online_malayalam_books_free_download.pdfIn PDF document text
    • https://27aa3d6a-fcc1-4574-a8e0-77dd5bf64dcc.filesusr.com/ugd/7683ec_297129d8215043cfad3b1cc87dc5fbe8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a6444c-7732-4b9d-871b-68fa3212635f/how_to_manage_stress_in_your_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58155cc9-2bc6-45c8-824d-b60f1a575a49/how_to_harvest_red_oak_leaf_lettuce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fcc962c-be12-4b06-abfa-6073f41107cd/read_sherlock_holmes_sinhala_books_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd02fda-42a8-4212-9059-6aeef65b91d1/tepanogetikulaxasoz.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/fractions_word_problems_worksheets_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/whatsapp_status_love_cartoon_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/95015665717.pdfIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_53f1db5f3c004687b6e2c9c679cb9661.pdf?index=trueIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_302c1230d88a493699913873162e7c5d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd4f128-2157-418c-8f19-4f67d18e50ea/95249983694.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001100d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100D 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off000120f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F4 5104 bytes
SHA-256: 9c7379f4f1e0a0b94aa98b868e0ccfc23ccf48988075244a46504ee99123bee8
font_02_sfnt_off0001323f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1323F 3024 bytes
SHA-256: f271277bc92c8ec255f016eb89af31946ace6cee13b85d2ca72bafc089855a25
font_03_sfnt_off00013d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D73 14632 bytes
SHA-256: 6681a45ab15d3527fd7d0f3249cfbd9bb9283349cb3ef108fc34d403db3f5b5b

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