Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a9b14e345c9975…

MALICIOUS

PDF

196.0 KB Created: 2021-06-11 01:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bd7bacc5db4286eadf2ba8e1dab1fba3 SHA-1: 6a4a9db1409b8dd25f1bab1e3e5e855574e979c3 SHA-256: a2a9b14e345c9975dae860eb3e74b37d98bd981a0c91c7ea6fcf3f1e4d16024c
166 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to compromised WordPress sites hosting other PDF files. This suggests a phishing or malware distribution campaign where the initial PDF acts as a lure. The presence of ML_NYX_PDF_MALICIOUS and ClamAV detections, along with the 'Password-protected archive handoff' heuristic, indicates a high likelihood of malicious intent, likely to bypass gateway security by encrypting a payload. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://crysiq.ru/uplcv?utm_term=weathering+with+you+full+movie+english+dub PDF link annotation
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607018be7cae0---piwakinaki.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/7700325c26773e1fa7d14f08622197b0/16322970069.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c29216d5594---91677990332.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/ximevij.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a62f6737b4d---lazaluz.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/39ceead156bcbf368c2c0292923025ed/1319429721.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/5smqrtbg05ql3d9pmup6iclhfe/30061738055.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/164f9kn6nghmep85imltrg9mrr/62766341302.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a1806a9706b---73995570745.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/41032191788.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/6aed0309afb27d278caaefea31a45f4e/71544880351.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/fenuvazivakamupenosomuda.pdfIn PDF document text
    • http://weddingdiy.cc/uploadfiles/files/20210609_121007_5272.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/2e2fd11c8b24759dd840ab44c3074afb/71017848159.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098446700380---lirasekaxegez.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d283d8b187---58229572379.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E85 77480 bytes
SHA-256: 1b013732b2fb1e4439ba63ebc7978923ae08665e091b91116dec9104a9404079
font_01_sfnt_off00028924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28924 5612 bytes
SHA-256: e79a26cfd42db7889d4dace701c8daddf281bccfef7e3e8d7894a9f3ad62aa7a
font_02_sfnt_off00029c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29C26 3384 bytes
SHA-256: 7f246122a3b08dcadeef539edc2210880a5603ba664c823cbbe348994c948aa2
font_03_sfnt_off0002a8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A8C3 16548 bytes
SHA-256: 0db8e5d531ee6ebf9f44fa56c507630545ecb52185bc7b0bf3ed568b155223a9
font_04_sfnt_off0002dad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAD5 16504 bytes
SHA-256: 5260ba5526b557e28e6323e68acf0f7e7fd0cc3b0445c86ec70877a1654eb356
font_05_sfnt_off0002f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0F9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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