Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63d11ff125cc93b…

MALICIOUS

PDF

79.0 KB Created: 2021-03-20 13:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0cf65b29a5f688f43dc9013341602651 SHA-1: 42588559dc3efda066534ab40f4e2536116007b3 SHA-256: b63d11ff125cc93b48e9f28d41754516991b2ef02c998e46922e7ca24a3e32ea
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, characteristic of a link farm designed to improve search engine rankings or distribute malicious content. One of the primary links, 'https://baarspo.ru/wix?keyword=su+binary+download+apk', suggests an attempt to lure users into downloading software. Although no scripts were explicitly extracted, the PDF structure and the presence of numerous external links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://baarspo.ru/wix?keyword=su+binary+download+apk PDF link annotation
    • https://cdn.sqhk.co/xoxujagemo/jNicgfa/fawad.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/achbLje/ez_load_snowmobile_ramp.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/libro_materiales_dentales_macchi.pdfIn PDF document text
    • https://kukitame.weebly.com/uploads/1/3/1/3/131379641/dewipuveve.pdfIn PDF document text
    • https://nezubarenegutel.weebly.com/uploads/1/3/0/7/130776328/nipidi.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/C4hjijf/mix_colors_to_make_burnt_orange.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/remumesaranuzepojagupofi.pdfIn PDF document text
    • https://kofosobi.weebly.com/uploads/1/3/4/5/134528260/nunapagilerajaj.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/irobot_braava_380t_robot_mop_pads.pdfIn PDF document text
    • https://gerikolobel.weebly.com/uploads/1/3/1/3/131398187/8244171.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/52877270281.pdfIn PDF document text
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/1722800.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/vipinib/dm_guideline_thailand.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/2006_chevrolet_malibu_maxx.pdfIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_10f4514816984df1b2b0469ad2cce7c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wopari/porsche_911_performance_mods.pdfIn PDF document text
    • http://nitobub.rf.gd/anti_corruption_act_kenya.pdfIn PDF document text
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_fae893f27d954184a2f7487bc78b39b6.pdf?index=trueIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_255a39c67e864ed6b39b8580b3b7d87c.pdf?index=trueIn PDF document text
    • http://rawuwad.epizy.com/353280686.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/donogudufu.pdfIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_9a59592a140844468aaedf4c4c1c554f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/sibesewitilefuf.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_off0000f6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F8 5276 bytes
SHA-256: 9c2d8f0f9f2f4a960f95292c69d7d1f711355260d6e0c0f65a34836adc043539
font_01_sfnt_off00010909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10909 11088 bytes
SHA-256: 661415997057851ff1a31ad7fa8587ed045075fbb91f135c6b34d91b891c2b48

Open this report in the interactive analyzer, or submit your own file for analysis.