Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab0537d81dd0d0a…

MALICIOUS

PDF

143.6 KB Created: 2021-07-28 09:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d70fd637acc85e7c0b93305c14a70080 SHA-1: 1a6de66f8acba504c421c65880f16312ec43ebb4 SHA-256: eab0537d81dd0d0a0c116f0e1720738c2f0390bd73da30e9d931b3ea7c7947a5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure that would typically lead to a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9512

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dajuicebarus.com/uploads/files/tazojetigezujaxo.pdf In PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/8eeb9555f03b71928d8837ef50a225ea/74209228241.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/redewaz.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/30395215575.pdfIn PDF document text
    • http://polipack.ru/content/file/25749276201.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2b597f8c2---vusumimogusenifixabof.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/9094477930.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/wijagugotabonelixipum.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/79683256103.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/pasesonufelal.pdfIn PDF document text
    • http://nrnchina.com/test/images/ckfinder/files/22402966016.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/neneromusemuwozupuvon.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/a4entaior4d9t65hsh3cup5bi2/89963100045.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/bazifejovul.pdfIn PDF document text
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/49661831825.pdfIn PDF document text
    • http://kme-kme.cz/files/file/10771701125.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/53ae115036af65484cdc40ae1cc4b510/13384973987.pdfIn PDF document text
    • http://weddingdiy.cc/uploadfiles/files/20210622_090312_1048.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed2c3d9dc7---66254069634.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c0b3b8e29---13775980109.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/46037404269.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/0d082c83accb6f88cf51e9c41b69cb41/nesosuxonebuduni.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/45144613265.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=abaqus+error+user+subroutine+umat+is+missingPDF link annotation
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001f6aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1F6AA 26112 bytes
SHA-256: 604a0d171cbcd121f733409ea14f87d0f2982005a3c3cb85d0ae79d3b6999347
font_00_sfnt_off00018e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E89 10772 bytes
SHA-256: f3902a0ff1ea6213513c82ecb03e38b17194c359995f9a1660bb83f23862c3d5
font_01_sfnt_off0001a710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A710 21172 bytes
SHA-256: 7df2665f7f25b87a968e6e97cfa3bb8e638de880713f61b86028c45401def9c8
font_02_sfnt_off0001de99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0002251c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2251C 2624 bytes
SHA-256: 4747faf157f899a169fa8e871cce486363fd020da60f43c945f0f0f7e5ff005d

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