Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d437c9503a374e5…

MALICIOUS

PDF

75.8 KB Created: 2021-02-27 01:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bd0dbc932ac12568db31bfd1b5eff2f7 SHA-1: d1acc96e413b580ab2ba122430bb4f237e135a28 SHA-256: 1d437c9503a374e51da6d8382942872bf797c87d9969bbac7780fa6716d68f52
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious content. The presence of these links suggests a phishing or malware distribution campaign.

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 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://leonvi.ru/strik?utm_term=what+is+sat+test+meaning PDF link annotation
    • http://xemizawufogutuf.scienceontheweb.net/fire_god_ps4_price.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495402/normal_60388cd24f237.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/what_is_the_spiritual_significance_of_the_number_1230.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/vepotuxu.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/vilokofazajikaxifowok.pdfIn PDF document text
    • https://begosibaluta.weebly.com/uploads/1/3/0/7/130775163/kofexerek.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/516011.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/paronamekij.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/89228645781.pdfIn PDF document text
    • https://zasubimivari.weebly.com/uploads/1/3/1/3/131383839/jufebuladimul_gagut_gagubepexudoxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pidodexogejax.myartsonline.com/mupoviwijig.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/the_complete_idiots_guide_to_music_theory_by_michael_miller.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/42292970792.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_off0000ee1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1D 4984 bytes
SHA-256: 627d3ce8279a5bd1e501d4a7b8a288d7b0936f96d01357dd0b945cb8b6ed3e9e
font_01_sfnt_off0000fef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF9 10320 bytes
SHA-256: a670b96413a046e34e41f1447d4393f887d917e9a368dbd2fd48f1fd74862861

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