Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c9e62598d4406f9…

MALICIOUS

PDF

70.2 KB Created: 2021-09-19 00:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 805aa14dbf5a5f0972e9208b8ffae1d9 SHA-1: fd0585278457da51be03e0c18a0b15bdc9d30b9f SHA-256: 9c9e62598d4406f9652d6451c367ceb1b4d54d8b96627a63368596ee6ca3ffe8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which are hosted on disposable domains or compromised CMS upload storage. These links are presented as a 'link farm' and one specific URL suggests a lure for downloading 'pixel gun 3d hack apk download', indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=pixel+gun+3d+hack+apk+download PDF link annotation
    • http://jubileejec.com/userfiles/files/46744276505.pdfIn PDF document text
    • http://jafra-com.at/userfiles/file/telosok.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1f4acb42d---jokavararedipekoden.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/19339097110.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///88143119869.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/18865175770.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/werewipevorigat.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a176a3195---43908759097.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/64664820305.pdfIn PDF document text
    • http://preiss.at/upload_files/files/givake.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/pisapetevoxedekonuge.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/wodibajowuzimisanoko.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3cac96aba---4170951921.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/tesigulorixifiweride.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210905011742623.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/17/zagofolaxawuwivijogugir.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/18917573436.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/19433092460.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/54465327970.pdfIn PDF document text
    • http://ljjxmining.com/uploadfile/file///2021091905441638.pdfIn PDF document text
    • http://jar-ted.pl/file/ximivafeg.pdfIn PDF document text
    • https://testgit.begurholidays.com/uploads/userfiles/files/todigu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE6 10980 bytes
SHA-256: c97c943307f9a61e5fcbdc05d96f3e012ce2e14b65e5fa4622f31eb546c51783
font_02_sfnt_off0000e429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE429 15476 bytes
SHA-256: 281b5d78e178eb9921a70288ce2cb2959982564b7569bd7431ffbe40e4c5d5d2

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