Malicious PDF — malware analysis report

Static analysis result for SHA-256 841f708e7a1c1d8b…

MALICIOUS

PDF

67.1 KB Created: 2020-03-13 01:56:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: fe5c8c5165c1213a77e1c2964b171c6a SHA-1: ead92b6746d48286e93048bb204895b69b055bed SHA-256: 841f708e7a1c1d8bcae7ce9693290b212ca5f756e28c23861ec93b523632ea46
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malware or phish for credentials. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 http://hyperion-ai.com/uploads/1/3/0/7/130739240/130739240.html#estimation+of+covariance+matrix+multivariate+normal PDF link annotation
    • http://thceasoningsspaandhome.com/uploads/1/3/0/3/130313082/norawonovo.pdfIn PDF document text
    • http://www.taotheologyandculture.org/uploads/1/3/0/4/130483875/napitolezidu.pdfIn PDF document text
    • http://celticchurchmaui.org/uploads/1/3/0/4/130435746/1739639.pdfIn PDF document text
    • http://mountainvilleumc.com/uploads/1/3/0/3/130323967/3091611.pdfIn PDF document text
    • http://hostmaster.dinahparums.org/uploads/1/3/0/5/130543059/7766ec9a0.pdfIn PDF document text
    • http://www.mediation-misbruik.nl/uploads/1/3/0/6/130621330/gasefosanawi-sulav-rafevoxagabi.pdfIn PDF document text
    • http://peoriamfg.com/uploads/1/3/0/5/130588499/2589908.pdfIn PDF document text
    • http://www.ecommerce102.org/uploads/1/3/0/8/130814106/leketekubuxiwogo.pdfIn PDF document text
    • http://youthtech.de/uploads/1/3/0/6/130604321/guwomesidisabodekoz.pdfIn PDF document text
    • http://mail.impresspartyrentals.com/uploads/1/3/0/6/130604198/9f761029.pdfIn PDF document text
    • http://www.newglasgowmassage.ca/uploads/1/3/0/5/130538862/vefoxane.pdfIn PDF document text
    • http://mta-sts.mail.hydeparksuzuki.org/uploads/1/3/0/5/130545885/45c4c66dddb370.pdfIn PDF document text
    • http://plr.group/uploads/1/3/0/5/130550981/b84eef176.pdfIn PDF document text
    • http://abcofxxx.com/uploads/1/3/0/4/130476885/nejil.pdfIn PDF document text
    • http://www.causewecan123.org/uploads/1/3/0/5/130550970/e88224d252ed7.pdfIn PDF document text
    • http://the5statesofteamsuccess.com/uploads/1/3/0/5/130551338/a2fc42b7c282c31.pdfIn PDF document text
    • http://www.duxburygb.co.uk/uploads/1/3/0/5/130588461/gemifaxemekujiloruka.pdfIn PDF document text
    • http://cpanel.grandriverblues.org/uploads/1/3/0/7/130740490/tuguteronomo.pdfIn PDF document text
    • http://www.coreconsulting.com/uploads/1/3/0/4/130494478/nunuve-vuxader-xurakulo-wakobufu.pdfIn PDF document text
    • http://animalmatters.com.au/uploads/1/3/0/5/130539227/9685939.pdfIn PDF document text
    • http://rifugiovallegrande.online/uploads/1/3/0/4/130488476/nibijobanagidupigu.pdfIn PDF document text
    • http://nidinidi.com/uploads/1/3/0/3/130323151/pamewimor-duluxexajukag-wexanixovun.pdfIn PDF document text
    • http://hostmaster.girltowoman.com.au/uploads/1/3/0/5/130551222/tunelusopugaxovumoke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: animalmatters.com.au 3 samples

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB72A 9140 bytes
SHA-256: 6f19e8bf54e98764b5e8d58fc18bf51ffbabc65fef420a47785e8e4f560e4cf9
font_01_sfnt_off0000da04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA04 3588 bytes
SHA-256: 49f8c933ea0a0e57805b597ddafa49cd536bd4421f1a3c556adf91bd043eb7e3
font_02_sfnt_off0000e6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B9 16484 bytes
SHA-256: e31b2f7a9849f515ed03460fede15f4796f0f5e049bf9898e594a64095fd747f

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