Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0d49c3daacf3a9…

MALICIOUS

PDF

80.4 KB Created: 2021-09-06 18:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fdd3692d095633e6fc030da1991f9f4e SHA-1: 1ae52deae310371389c0dff812b37d9484bc3599 SHA-256: 8f0d49c3daacf3a9db72db3cbc2db2b98004332970c45366628b14b06b3e5733
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://dribblebar.pl/userfiles/file/togegedozezulofazuvoxuf.pdf In PDF document text
    • http://rkmaster.ru/uploads/files/fipeguwi.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/e014da8f29798d0100217a2dedd058a2/72171141735.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/vobaxilavufidujajepowepa.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/8986756242.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/6174424843ee57eb7ce8ddaaa7f4e8b0/dixeramuxifomarikav.pdfIn PDF document text
    • http://kingkady.cn/uploadfile/files/getipujozofajugo.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/g8f107dhvdmrmfjsokrjnk74g2/79211781752.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/51534186681.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac50373b5---xofuzo.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2eb83d4693---47910258744.pdfIn PDF document text
    • http://cybernet-ap.com/UserFiles/File/45474273962.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/fanerebegetodugubesu.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/a84b6bbd37bc0728e9e27e293d90f6a8/63037548513.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/mojofaviki.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/edinesatijirumelovedo.pdfIn PDF document text
    • https://lrdreamteam.com/files/files/file/InfoProduct/file/magulibogenule.pdfIn PDF document text
    • http://studiostocchi.eu/userfiles/files/ridesufojunore.pdfIn PDF document text
    • http://placidlakes.com/larpm/uploads/file/diwusufibitiba.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210826060310_1632311773.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f77e48e6d---vebatudupafatof.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/rc3hsoflpv7571p96d1ffb70v9/28680662106.pdfIn PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/fujoxigedowe.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/bopijufunanopi.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/be1cf15c457fb5ecce2605c7dd68e7fd/mewajupexanizovofenem.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/zifosidujibope.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=barakhadi+in+english+pdfPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05A 10704 bytes
SHA-256: 8e7a3350bf1776ac0c6d13b49379f5f7968fe4f88a55cdb0f99dca7b2e1c36d4
font_01_sfnt_off0000d890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD890 22116 bytes
SHA-256: fa7dc94a0bd0b5f882bbdf8511c7965d4b208084f37b0fc7364a93e0ed2da174
font_02_sfnt_off000112b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABE 1936 bytes
SHA-256: 9aeb06937c81a5c56cf99af8deab830259c8e7bb488e779e8e638c33337cf583

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