Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2ee10fb88a742b…

MALICIOUS

PDF

82.0 KB Created: 2021-04-28 11:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72b253d4b33f8238679e4904fcfe21bf SHA-1: aac8e9ac71b1aa7f4f1a057a8b86e2b2bfd841c9 SHA-256: 6e2ee10fb88a742b7a029dea8e4e3f706ca93bb00bf6d9a09d22421ee33e696a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or malware distribution, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=safety+1st+onboard+35+infant+car+seat+manual
    • http://moxupasasitote.mywebcommunity.org/english_descriptive_writing_book.pdf
    • https://kowirakixodoxe.weebly.com/uploads/1/3/4/4/134467502/sozesadamov.pdf
    • http://gewututikame.getenjoyment.net/lobokelepipefod.pdf
    • http://instapriz365.site/castle_on_a_cloud_lyrics_les_miserables_2012s9r87.pdf
    • https://vudunige.weebly.com/uploads/1/3/5/9/135981242/60398802b0.pdf
    • http://irbestate.ru/international_mailing_address_format2zjno.pdf
    • http://lifegirls.site/mxr_skyrim_modskr79l.pdf
    • http://ruszaimclub.ru/coreldraw_x7_keygen_rar7g6lz.pdf
    • http://kunozoxutokusu.mygamesonline.org/xulom.pdf
    • http://tanijijud.sportsontheweb.net/82204775146.pdf
    • http://tesocoin.online/dual_adjustable_bed_sheets76ox9.pdf
    • https://miwidekufaxojud.weebly.com/uploads/1/3/4/7/134753597/xunopiwavimugo.pdf
    • http://kobivoweder.mypressonline.com/asus_p8z77-v_lx_lga1155.pdf
    • https://lanulizuxuja.weebly.com/uploads/1/3/4/6/134658029/3e9286b3cb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/patilawasu/davawabibeli.pdf
    • https://d397443b-80d0-4e74-967c-4ce830ee3754.filesusr.com/ugd/0a76f0_0c7b845e76d04711b30b4213688449e9.pdf?index=true
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_30686f8ac12d478782fe5c5abc256367.pdf?index=true
    • http://jozilaro.atwebpages.com/microsoft_dynamics_ax_modules.pdf
    • https://s3.amazonaws.com/wujodibu/suzowotuseb.pdf
    • https://s3.amazonaws.com/vufuzewasi/auxiliary_verb_word_champion_answers.pdf
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_d071779dc05c4756a767ca810701db1b.pdf?index=true
    • http://lugimeviguv.myartsonline.com/present_tenses_mixed_exercises.pdf
    • https://s3.amazonaws.com/vuterijoze/vox_ac15_heritage_handwired_review.pdf
    • http://satawakerexe.atwebpages.com/meade_4500_telescope_eyepieces.pdf
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_a17c72df07bc434a814618dfdef55568.pdf?index=true
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_416c2bf860c045f8a7986273c6a4a61d.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103d5.bin
1b646bd66798a22d40f87f17515e272d1d9bc76ec78530bf744c5d8cdeaea4f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103D5 5852 bytes
font_01_sfnt_off000117c1.bin
dfb1bb8242410f439b4d7222ef2d84db5aec3c37e44fa212f9036d2a08cf8e71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117C1 10000 bytes

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