Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94e7e3f1760181f…

MALICIOUS

PDF

69.6 KB Created: 2021-02-18 22:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5f29ceab3549486d65d2a460ce359c5c SHA-1: c13268d2ad9ff64ad07acede16e120ea662f746a SHA-256: e94e7e3f1760181f3f235880554fba95bfd92eba11de7750bbb44e9157933abb
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://maypoin.ru/aws?utm_term=mba+finance+formulas+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385207/normal_60172e5be6589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_6025ad25f0306.pdfIn PDF document text
    • https://fiketizi.weebly.com/uploads/1/3/5/3/135387405/8067952.pdfIn PDF document text
    • https://mafadojidakiwo.weebly.com/uploads/1/3/1/8/131871721/5949330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_6015f2f6617a8.pdfIn PDF document text
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/5cc4882f.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/ZRUgdje/80s_music._best_free_80s_music_radio_stations.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457839/normal_5fe31feeb33ea.pdfIn PDF document text
    • https://warazafipa.weebly.com/uploads/1/3/1/3/131381481/aefce54337db5d.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/gjEgdZH/merge_rush_z_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/dyjDM6J/jenivusonoma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444098/normal_600327cc0ef0b.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/sigobija/elementor_templates_won_t_load.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/jurassic_park_theme_sheet_music_clarinet.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/banunesofenatezila.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/bruninho_braz_seu_amorzinho_sou_eu.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/dapuxijibudub.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_off0000d3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AA 5448 bytes
SHA-256: 358563188d91f908cc87468114cc5b193a2260dd7a8c875d38605610f67df7c0
font_01_sfnt_off0000e620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE620 10416 bytes
SHA-256: e6a22f202db1e4e2707331324ba51920296a10875320a5701f29d5a313c28001

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