Malicious PDF — malware analysis report

Static analysis result for SHA-256 909dafd5780d7b47…

MALICIOUS

PDF

78.3 KB Created: 2021-03-16 18:25:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 402e42c251401105c8587494d28a2655 SHA-1: 5d3dec4219060584ab108992641acbf0e28f3dbd SHA-256: 909dafd5780d7b47dee11b43cb00554b1e57ceaab89b50406af0c314d08a14b2
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. ClamAV and ML heuristics flag this as malicious, likely a phishing or trojan distribution attempt. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's intended to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://midufefew.ru/wix?keyword=the+street+of+the+canon+questions+and+answers PDF link annotation
    • http://talemine.getenjoyment.net/lamilizutoluse.pdfIn PDF document text
    • https://nurigefisigutip.weebly.com/uploads/1/3/4/6/134628418/7dbde89935529c.pdfIn PDF document text
    • https://jabuzowe.weebly.com/uploads/1/3/4/3/134312688/kizegulexikale-nulaki-tibatobo.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/rifidixixixul.pdfIn PDF document text
    • http://dexaputanit.mygamesonline.org/where_was_the_miseducation_of_cameron_post_filmed.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/8416483.pdfIn PDF document text
    • http://vizojuzoninunoz.scienceontheweb.net/mathematical_physics_for_msc.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/wejuvono/dodofexojerorogawi.pdfIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_6a39444dcbdd4efaa5400d81c74bef48.pdf?index=trueIn PDF document text
    • https://93641f3c-03d3-4c8c-b6db-0fd9bfabe798.filesusr.com/ugd/384ca7_04f71abd30cf4f6fb13340fa31d44731.pdf?index=trueIn PDF document text
    • http://pogetowem.onlinewebshop.net/makozitedumorofojepa.pdfIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_126685fc856c473e80b65794865fe3e5.pdf?index=trueIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_a33c9abc146b477aa6dd804e2f065c56.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_566c5f0951c34e099ab8c7a0e21e81e2.pdf?index=trueIn PDF document text
    • http://zotubune.myartsonline.com/accuair_e-level_touchpad_controller_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96478bc5-7c6c-4413-b8dd-3236cacae899/weapons_of_math_destruction_chapter_5_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b3b453-8004-4d03-b52d-2ea84632f920/how_much_does_a_navy_seal_team_6_make.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/46979559084.pdfIn PDF document text
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_4a52ebbb7b8f43338127d6f85bd57a46.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7618c7fe-6902-45a3-ab05-d91cdce1f170/plato_republic_book_3_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13dd2a80-cba1-4cfa-8006-b289545665f9/82608752808.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/98605791352.pdfIn PDF document text
    • https://b66a6cc6-7028-4fd7-9d19-084b2b27c535.filesusr.com/ugd/4015cf_45fe3724797145dd9e913d066b5fdcca.pdf?index=trueIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_2da025c56667419b87e358fdedb97506.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0889f6f2-43fd-4e13-bb1e-677c04cd2814/cfa_level_1_pass_rate.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/33031180689.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_off0000f56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56B 5244 bytes
SHA-256: 1792cc7d62932751529cdcc0e8eadf0483a148d5b79e7a2adc99453f92db0cec
font_01_sfnt_off00010746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10746 10680 bytes
SHA-256: f7856934c7d67f02c022d93cac394e6fef75268d7db36074b3c9be8117e90b13