Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad94e039b89faccd…

MALICIOUS

PDF

78.1 KB Created: 2021-03-25 04:13:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8f3a8f855286305eaf5f4b13fb7efafe SHA-1: 701dbd62eefaca4fa6f0977eef0603fcf708983e SHA-256: ad94e039b89faccd522758161f3d09cd1237c65dec0ff60fc451413d344d9278
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://midufefew.ru/123?utm_term=beneath+this+man+pdf+free PDF link annotation
    • http://galufixagomedo.getenjoyment.net/14003304873.pdfIn PDF document text
    • http://letekidela.iblogger.org/21983438036.pdfIn PDF document text
    • https://voxepobar.weebly.com/uploads/1/3/4/6/134668427/mivaw.pdfIn PDF document text
    • http://chebsvet.ru/ardex_concrete_dressing5z40h.pdfIn PDF document text
    • https://fimiximokizo.weebly.com/uploads/1/3/1/3/131384127/tidivabuzevija.pdfIn PDF document text
    • http://snt-br.ru/93018828433oriu4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vavadot.onlinewebshop.net/sunforce_solar_motion_security_light_with_60_led.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/48100893904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b8651aa-ff15-4f2e-a1ba-979f7d6fd24b/sinners_in_the_hands_of_an_angry_god_imagery_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/lugavuwuzasep.pdfIn PDF document text
    • http://nazifaba.rf.gd/7267415523.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/reporter_newspaper_hillsboro_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d188bfd-801d-4783-bf3b-b7b8d5d3cfec/adobe_photoshop_cc_2017_tutorials_for_beginners.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/34135568479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e145ba9-a40a-4f69-b12b-575257ba42a6/66955418948.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/wuzin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b9011b-b601-4b8a-849f-cbdfcd50f523/77970124753.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/bullet_bike_hd_pic.pdfIn PDF document text
    • http://kezadovimitaw.rf.gd/88692761480.pdfIn PDF document text
    • https://cdn.footystats.org/In 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_off0000f464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 5300 bytes
SHA-256: 7fa579c718e28b1da06ab588926758c9c23d7ccaf31fc54fc99c8977003c00bf
font_01_sfnt_off0001063d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063D 10836 bytes
SHA-256: b42a910d307b18339b5645d1b8582a15ed7c8a611aa1ac5d059abb17fea0eeb9

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