Malicious PDF — malware analysis report

Static analysis result for SHA-256 022e6c974d849667…

MALICIOUS

PDF

93.0 KB Created: 2021-09-12 20:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb9036f33c46a6920396d0d930fe70d0 SHA-1: c6cf34cdee9a82eed9db9a536c3e74dba93cbfc2 SHA-256: 022e6c974d8496671e849c352b544fd149d352e0767bcf2805f30fc04a38e8bf
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it is a link farm and an advance-fee scam lure, likely attempting to trick users into downloading a malicious PDF. The document body is heavily obfuscated, but the presence of multiple external URIs, including one pointing to a raw IP address, suggests it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161318e3041ece---12343127568.pdf
    • http://professional-tuner.at/uploaded/file/21760023368.pdf
    • http://xn--80aafbladvtgxneccoge3bt.xn--p1ai/pict/file/bumojawujulal.pdf
    • https://fptica.ru/images/file/xorox.pdf
    • http://157.230.241.115/image/upload/File/vetinekevubavipax.pdf
    • http://ajk-opakowania.eu/upload/fck/file/loparazupisi.pdf
    • http://ttmplus.com/userfiles/files/pegamujiweto.pdf
    • http://appli-veolia.net/ckfinder/userfiles/files/67663998662.pdf
    • http://itemclinicchina.com/ckupload/files/36428638180.pdf
    • https://sofanet.ro/ckfinder/userfiles/files/tekafugogadomasexotivinam.pdf
    • http://www.specemc.ru/upload/files/rekedopaletenologekoxebo.pdf
    • http://myshiou.com/uploads/files/202109091025429275.pdf
    • https://cissud.it/uploads/ck_editor/files/53201536381.pdf
    • https://ms01bet.com/contents/files/14670380895.pdf
    • http://bjsixiang.com/jingkelun/userfiles/files/20210902203405.pdf
    • http://getsolarny.com/userfiles/file/24148916752.pdf
    • http://zatoodesign.com/userfiles/files/jakapitukisaro.pdf
    • http://marta-galan.com/files/varios/file/57330329557.pdf
    • https://hunglivet.com/uploads/files/202109060921132930.pdf
    • http://baschin-heizung.de/meineBilderAlbertGrundschule/file/nubuvopifezukojofex.pdf
    • https://textolinguisticsolutions.com/upload/editor/file/10967621847.pdf
    • https://brincandoeaprendendo.com/fotosempresa/files/51444410146.pdf
    • http://arabic.cz/ckfinder/userfiles/files/98372561406.pdf
    • http://www.civilhospitalpalampur.in/img/uploads/files/68959453628.pdf
    • https://yourdentist.ro/app/webroot/files/userfiles/files/jovenekovolum.pdf
    • https://mogilew.ru/userfiles/file/fozizawunobo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=pubg+chinese+apk+download
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f294.bin
ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF294 1820 bytes
font_01_sfnt_off0000fb1f.bin
a1de69ddac7f40685fa2893c6508ae4889fc6f4ff36edfbe21a6e6f38bac24f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 11012 bytes
font_02_sfnt_off0001144a.bin
0f258698d50f216931f06cecbb26bbaf63c37c49fb837a58d39c9bf88670adf7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1144A 22372 bytes
font_03_sfnt_off00014ded.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14DED 16792 bytes