Malicious PDF — malware analysis report

Static analysis result for SHA-256 560ee724370c3f05…

MALICIOUS

PDF

79.7 KB Created: 2021-07-08 20:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a74be19f1e2c5e38acf0f7cbeaf5ce23 SHA-1: 27d57be4922d32b1b31867c45f6960cc59ad1eaf SHA-256: 560ee724370c3f050019a5362ce5a6ce1522814d040abcb00e6cdcdf5ca77d7b
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this file as 'Pdf.Phishing.Trojan', further supporting its malicious nature. The ML classifier also flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5097

Heuristics 5

  • 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
  • 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://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/e4i8ut6dp8paevvmrkktroq6ji/sutulogob.pdf In PDF document text
    • http://afgventuregroup.com/cfiles/file/bosinezubudisobofafixak.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/relizevupanebabinome.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/lixolobomis.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9a1acdb57---ligapu.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/70436835496.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/naxilafonepuxot.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/ce9d8a6857de897ff540bcd24a2a7f2b/temujoz.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ab7150279---lupesap.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/65b3281e470302705c067277de1a645f/10944396180.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/42310402114.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/xanumozowutorukojopa.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/virakawivopuwudowawet.pdfIn PDF document text
    • http://sns.hu/_user/file/jekovoxatilamofinu.pdfIn PDF document text
    • http://hhcreunion.com/clients/4/43/43f38dc94a4d709fe78decf5bd9d7370/File/6682448532.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b830424007e---nadifekowobogojafadozew.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/17272991663.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075add606a17---76075194299.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/peduvikebanavinulesom.pdfIn PDF document text
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/lonugope.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/1i1mgrfurf819q2vs7fpm6ccs5/wefasapuwokejutup.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3806e4191---17291915492.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=ssc+junior+engineer+previous+question+papers+electrical+with+answersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF207 11256 bytes
SHA-256: 8f5a47456b6c0bc6a9679cd650e198e84871024cdf6c4998120ef53bad087cab
font_01_sfnt_off00010c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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