Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddff701890c565b3…

MALICIOUS

PDF

90.2 KB Created: 2021-05-14 00:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c13ef3bb8a4c6fa973b7ee205072faa3 SHA-1: 9e3b3fffac9cf43be519b425b51bbfdd0a084b26 SHA-256: ddff701890c565b373f2792786bff12c59e45b8fe9c63f96cb22a05b7c73a096
186 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 0.9991

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://jottigo.ru/strik?utm_term=is+percy+really+the+son+of+poseidon PDF link annotation
    • http://nababaze.iblogger.org/adobe_scan_scanner_ocr_apk_free_download.pdfIn PDF document text
    • http://xolimaked.iblogger.org/tigewobijobelowemageramux.pdfIn PDF document text
    • http://kazaxukiga.getenjoyment.net/rijamiwufuxemopejoxikuge.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/gijugulapasevi.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/apostila_auditor_fiscal_gratis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lemizirimafon.epizy.com/85094156168.pdfIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_7334d41a9bc44dc8aa5c0f8b190f1618.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/2010_camaro_2ss_specs_0-60.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/free_online_editable_family_tree_template.pdfIn PDF document text
    • http://guxejusoselota.myartsonline.com/48747853173.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/40671533321.pdfIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_f13feea6a7934290a827117babf33b4b.pdf?index=trueIn PDF document text
    • http://keximatefabuzi.rf.gd/bhavesh_joshi_full_movie_movies_counter.pdfIn PDF document text
    • http://wazuvit.rf.gd/acronis_true_image_free_version.pdfIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_cf3209ef0d014e7abb6c8d570ff617b5.pdf?index=trueIn PDF document text
    • https://2065f6f1-29fb-48ac-a230-4f4ab2d4b746.filesusr.com/ugd/b62953_ca81fac387b74538b42916144a255577.pdf?index=trueIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_1ea58b4385f74e0eaa4bed7982b39471.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/kasun.pdfIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_1b49108af0b84ff39138e7a28ad8d964.pdf?index=trueIn PDF document text
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_a934ba84af224da4bdc938a3c84d220c.pdf?index=trueIn PDF document text
    • https://4a5bfc55-71df-4474-8f3e-9f6aca65c64b.filesusr.com/ugd/29b6ce_41ccd04f830e40aeaf463ba17411856c.pdf?index=trueIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_6e10bd206324490f93f16ed414b973d9.pdf?index=trueIn PDF document text
    • http://jilerixam.epizy.com/reliability_centered_maintenance_implementation_made_simple.pdfIn PDF document text
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_9bb44831266445e992fe82d3d526b99c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liwara/equidad_y_justicia_social.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_off0001240c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240C 5284 bytes
SHA-256: e54d90fb08e99f0f9abb7b7ce07fdc9de87b55c6286fd05413b7e4b192f4b942
font_01_sfnt_off00013606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13606 10832 bytes
SHA-256: 34664d42da2c0423132225b1721c041491a1c074da035d9ccab57b4304bfffe7