Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61d324584de81ec…

MALICIOUS

PDF

345.7 KB Created: 2021-06-10 20:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0067d4550fb392a5e8cb7818dd8cd8e1 SHA-1: 285c73e137e6203336d988c958ebe74cd8451db3 SHA-256: d61d324584de81ecfcd562828a235a82e0d719acc98b3496ab85b5c801f2796c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains multiple links pointing to compromised WordPress upload directories and other suspicious domains, suggesting it is part of a phishing campaign. The presence of embedded URLs and the 'Urgency / deadline lure' heuristic further support this, as these are common tactics in phishing to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8885

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://infrive.ru/uplcv?utm_term=expanding+tactics+for+listening+third+edition+teacher+book+pdf+free+download
    • http://18554080.com/userfiles/file/wivipimuxalikawuk.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bec9d6415---12202384241.pdf
    • http://amandamaitland.com/images/file/dozigike.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c62d1c237---xoxazatutobuwofosumava.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bb733554aeb---fozegowawofu.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/cc85431fb2bd20f0a69004fa66e6f874/82553728785.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab13168b196---wapenojiwaman.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45702c40e6---vaketizaraxolev.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073519fc92e7---51989427409.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/a60bda65b15e895c9f8db95d0614b63e/sakimijexevosijis.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/7510c86574997b0253babc47ddffd14f/22078233446.pdf
    • http://nitexprofi.cz/userfiles/file/sezesomufudamolawuxubi.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/86j2r3b5pje9uklpvdf9tc045k/gokewovavuxuduz.pdf
    • https://pnlcoach.com/misc2/file/
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084ae30b5115---xavezexafaxusetivamuba.pdf
    • http://assistance.uz/images/shared/file/pebagovusufur.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/9dd9f81ce3ee700df770242a55857400/74463655806.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160741fc0239e5---disuxikixatale.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • http://www.opentle.org
    • 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
    • http://scripts.sil.org/OFL
    • https://gitlab.com/smc/meera/blob/master/COPYING
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_011_off00053be7.bin
981178a37e99c54db337fe8ca473596aba0b5b514841865b47fb13fe181c1000		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53BE7 17324 bytes
font_00_sfnt_off0004c878.bin
b564497598865c818d85f8420abe8b9f9516f0e20df5ae73e8f3cfe2a7afe7d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C878 4032 bytes
font_01_sfnt_off0004d6f2.bin
8088f69478332f2316846c5c955f5d23825b554723b4ff8659a35a66459fa3b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D6F2 5740 bytes
font_02_sfnt_off0004ea87.bin
4bb619f7e4c8d10c6650d66271e6db770d7def95493d885be3efe54e7c100c22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EA87 3048 bytes
font_03_sfnt_off0004f68c.bin
4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F68C 6148 bytes
font_04_sfnt_off0005066d.bin
cd5e242432a4f1bfbb04b4e61140b82a3ef33e33231aeb1ac84dd04f032422c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5066D 18700 bytes

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