Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c405dbcbb4ddf11…

MALICIOUS

PDF

80.0 KB Created: 2021-05-02 20:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2f2333b32e34ce14cdfa0063a2af6159 SHA-1: 1c619426441f18faf092d2ffb1d00b0658e4ed52 SHA-256: 5c405dbcbb4ddf1163ac7ade5630e2d5e5f63389f12d30ca0f15a31492094342
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 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=safety+glasses+used+in+smaw PDF link annotation
    • https://zexaloguf.weebly.com/uploads/1/3/4/5/134576330/370579.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/hfJjhji/elementor_404_page_template.pdfIn PDF document text
    • https://wulelosen.weebly.com/uploads/1/3/5/9/135992808/damonokanepovuz.pdfIn PDF document text
    • https://gipewiraxo.weebly.com/uploads/1/3/5/3/135334151/nusezomi_rajido_nurazevob.pdfIn PDF document text
    • https://podosutopo.weebly.com/uploads/1/3/4/5/134590637/gewajiwikexuxaf.pdfIn PDF document text
    • https://jeduwisuduxib.weebly.com/uploads/1/3/1/4/131483356/60cbb.pdfIn PDF document text
    • https://libadelalisam.weebly.com/uploads/1/3/4/5/134579317/2f56136.pdfIn PDF document text
    • https://menolalosixoj.weebly.com/uploads/1/3/4/7/134714047/sutenoruwejulujuz.pdfIn PDF document text
    • https://cdn.sqhk.co/lilodipu/XkieWhc/dujasuwutizepupinop.pdfIn PDF document text
    • https://molowusutet.weebly.com/uploads/1/3/1/3/131380828/7284a6e727b0999.pdfIn PDF document text
    • https://wakukaxowemaba.weebly.com/uploads/1/3/5/3/135303752/7167122.pdfIn PDF document text
    • https://wekasekizoturir.weebly.com/uploads/1/3/4/1/134131482/venatosuxuwaki.pdfIn PDF document text
    • https://zafivagofe.weebly.com/uploads/1/3/6/0/136011523/kixonekov.pdfIn PDF document text
    • https://foxewazijibaj.weebly.com/uploads/1/3/1/3/131379544/mekulegiwuruwif-lakipilito.pdfIn PDF document text
    • https://cdn.sqhk.co/japivuwali/iargdgf/41711607276.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7e079b21-6cfc-4bbc-a8af-001f4930a7f2.filesusr.com/ugd/f66805_647466ac8087405493a9cf154b1ca8c4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/the_chaser_twilight_zone_episode.pdfIn PDF document text
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_24b4e60e273b4360a9d00e6cd51a2869.pdf?index=trueIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_0dc2b6fc24db4a11a21dd878357725e6.pdf?index=trueIn PDF document text
    • https://f4e740b0-69d0-4d5c-a0c7-362dc6b2ad6d.filesusr.com/ugd/0356fc_5cc025e30a714f7886d5c3dc02b1ef02.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/acapella_maker_apk_pro.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_c3087c324c69426baabb9b018b03243e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefipa/guvilela.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/jopibogukatexulotisat.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_off0000fa68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA68 5428 bytes
SHA-256: 4cd0cca68d39bc38c2bc134019feceebacdedfb1ac06b598da7f0bd4fb49b67d
font_01_sfnt_off00010ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEB 11092 bytes
SHA-256: d47a85b32a028f7f0a9084bb2be2ada00acaf74211dcfcba2af018abbb07b03b

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