Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ed9b6caf25b1d2…

MALICIOUS

PDF

73.0 KB Created: 2021-08-04 19:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a8b23c9eed0c4558f2eade83019bdbea SHA-1: ed78d6ad2e5417efed7640cb83633b9d4ad60373 SHA-256: 46ed9b6caf25b1d2132b8f20d0e615319fb67bed8fb7c8162db8210b07996770
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The presence of numerous URLs, including those with 'utm_term' parameters, suggests a phishing or malware distribution campaign. No scripts were extracted, but the overall structure points to a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://irlanc.ru/uplcv?utm_term=army+service+uniform+setup+guide PDF link annotation
    • http://tapestry.cz/images/file/files/1150763618.pdfIn PDF document text
    • http://sushi-belovo.ru/files/lorigirawivufegiz.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/56818726157.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/pivetawuzusamibenudemi.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8fee5e425---63194811519.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/60469350028.pdfIn PDF document text
    • http://realloans.com/clients/73966/File/pumisodilifavegabalasos.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/65094708913.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/42104715419.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/77770cab6faced47dc6cb8b59073691d/17496593377.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/93683484850.pdfIn PDF document text
    • https://buyafranchise.org/files/files/95830681955.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/39061449249.pdfIn PDF document text
    • https://tckontrola.hr/files/munugokepog.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/71319669134.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/qfsarqgv3r5ubaflhg4llm341d/retafudurarowezom.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/28854934680.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2020.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/juwexalolowu.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/6fdb5fc001c3a53f199f63ad2bfd36b2/jenegawopadikefe.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/23263679286.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3b4ec38e2---xaduzevadoxusitap.pdfIn PDF document text
    • https://wsbtitan.com/images/file/gukugefenozulumovezewax.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC8E 11016 bytes
SHA-256: 8f49e49a35d415e0af611938674bf9b6c068034ebeded0c41a601cef994cd264
font_01_sfnt_off0000d60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE20 15476 bytes
SHA-256: 204dc1501d93e6c733a21b715788decb1e4b861d284c5c8b8c05f2f8d40201b6

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