Malicious PDF — malware analysis report

Static analysis result for SHA-256 980b926d386008f7…

MALICIOUS

PDF

89.7 KB Created: 2021-09-16 23:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5cb64f021016755d91fc40ec21e1d16a SHA-1: f6ba31d6a2e3d8aa1031c55dac851fe9203bd010 SHA-256: 980b926d386008f71a0c07334c5fea25ad198d2209361d78538e587e0b8f9803
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and link farm heuristics, indicating an attempt to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics suggest the document's primary purpose is to facilitate access to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://garglob.ru/uplcv?utm_term=how+to+download+games+in+samsung+galaxy+tab
    • https://calendarsunrooms.com/userfiles/files/perapuwabasakebololave.pdf
    • http://orvosvalaszto.hu/uploads/files/duxubesusi.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/a0e97b3d79db8b7a0b8b869cd08a9199/gelolofekusosezex.pdf
    • https://hk-delight.com/UploadFiles/file/rodolefotufovezovojow.pdf
    • http://elma-itc.ru/!upload/files/runaduxito.pdf
    • http://xn--eyt274i.com/upload/files/votaxafiluwupuno.pdf
    • https://dongcohonda.com/userfiles/file/99842484218.pdf
    • https://houstoncoinclub.org/FCKeditor/file/48129186445.pdf
    • https://rumahbaruku.com/contents/files/8424748064.pdf
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/waribuve.pdf
    • http://architettotoma.it/userfiles/files/pubuxegoxusubarusowu.pdf
    • https://capecoralliving.com/media/file/dodefozokum.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac85681c2c---vasasudomebawobipigud.pdf
    • http://byecook.com/ckupload/files/nitedezinudebedotareku.pdf
    • http://autosoftware.company/autoresponders_images/files/88375766989.pdf
    • https://daulte.com/ckfinder/userfiles/files/68674840737.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/f1adc550db5ed22748c6467def88f5c8/23494553054.pdf
    • https://listocrm.com/userfiles/files/tagugeroregejudaxaleveba.pdf
    • https://seedcambodia.org/htdocs/cljr/data/files/72688600576.pdf
    • http://cmsrecuperocrediti.it/images/file/padomisijomijujatasodasej.pdf
    • http://www.abcklima.hu/data/editorfile/lariwifupunazogas.pdf
    • http://crabandclaw.com/uploads/files/56696207877.pdf
    • https://vinaconexmec.vn/uploads/news_file/kananomuzule.pdf
    • http://thrifthelp.com/flash/thrifthelp.com/file/62264302381.pdf
    • http://k-sta.kr/FileData/ckfinder/files/20210913_6762D6C74D0EA2D2.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c3.bin
1a00d6d59c8585246880c65a193d4aaade3d8e61f15c65e8ec8e822b36009f1e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C3 18252 bytes
font_01_sfnt_off000126d9.bin
996afece8b52e9f790be3b71eecb8b26eb075b7b0f591116a1f19b064ac9c2c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x126D9 11024 bytes
font_02_sfnt_off0001404f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1404F 16792 bytes