Malicious PDF — malware analysis report

Static analysis result for SHA-256 79cd8ed82cd7d6f3…

MALICIOUS

PDF

90.0 KB Created: 2021-03-19 21:23:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 010e766daaf25806f99ee99185868d62 SHA-1: 12cbc8a3ddbf881df948f2e47788b61b2e8f49d5 SHA-256: 79cd8ed82cd7d6f3bb450d60d97049bff832790d5d9ea9f20081d960e9f07395
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 5

  • 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.
  • 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/wix?keyword=lecturas+de+reflexiones+para+jovenes PDF link annotation
    • https://bejivuvepezera.weebly.com/uploads/1/3/4/4/134437422/c7c92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_6023c28799d71.pdfIn PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/5a6e7.pdfIn PDF document text
    • https://lalevajapogos.weebly.com/uploads/1/3/0/8/130874146/5912866.pdfIn PDF document text
    • http://jiwujat.iblogger.org/tojinetasegudup.pdfIn PDF document text
    • https://kovunigok.weebly.com/uploads/1/3/5/3/135317038/afb3b3d0f469c.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/benafuramorofo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450632/normal_5fe16821c737a.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/jodabiladezot/lewetadupenatemaxipul.pdfIn PDF document text
    • http://mowigefugitixa.epizy.com/xawojenakawimomix.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/how_to_pass_grammar_test.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/90623010950.pdfIn PDF document text
    • http://kiwozoma.epizy.com/75816033689.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/adventures_of_tintin_movie_review.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/fujifilm_finepix_s1800_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/doxobolis.pdfIn PDF document text
    • http://geletisabifuzo.rf.gd/44527352267.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/vapevatijivojula.pdfIn PDF document text
    • http://zusaxadixuxot.myartsonline.com/xunakejab.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_off00011e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2A 5292 bytes
SHA-256: 5a3495e728926e4a1c700dee0a98d86c734ea865c397f94cd07f25783984222e
font_01_sfnt_off00013050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13050 12728 bytes
SHA-256: 0261b4a9732f318b5dc908bbb8b72d40ef7bae1bbafdba8a9fd13a2a1543ac86

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