Malicious PDF — malware analysis report

Static analysis result for SHA-256 07489f54172fad09…

MALICIOUS

PDF

78.5 KB Created: 2021-07-21 22:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 927a24a0f73af49139e45cad4f2b1bea SHA-1: d64e14c4d95a8549c0bc7d47cd3cbbfcde2284b3 SHA-256: 07489f54172fad09dcf76046fe4e3cffd4feed75d13edbf5bb806ce3e19da22a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification strongly suggest malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c56bfc5872d---65836426892.pdf In PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c20c2d273d---makuduvezasipokaluputola.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/c1155bfc8afa382ef3cf76da4a4ce102/2932790261.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/64311917c61d60c8a1805b36e3e18f8b/94479766244.pdfIn PDF document text
    • http://haus-st-otmar.ch/userfiles/files/sesudusubujak.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/62589119058.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/3tg22hrt7as31g459j965s4r05/kagufemuguwamemetakobile.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-5/20210505105859780164.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/68227594177.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/mfsgfvi474mrf9mmnhrlk0131i/joraf.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/92478616735.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5252f0a50---webejamepodika.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/toredaguk.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad74c44cd18---57611755094.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/pm2suji7lchs08n2asoaf6qqd1/wufakutu.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/7dee63c5371fd8d65331392d88fe92b7/52732974388.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/17764256719.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b26053b1155093e9ebaf51a57b8d24ca/nobufobi.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/bedifimokojodosagugefejit.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/40217107069.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/87520833384.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+convert+pdf+to+mp3PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8C 10628 bytes
SHA-256: d84c523891b0624f41cd450f5a3cccbcb7b94a8208cdc5f836fa69d3b26a1b20
font_01_sfnt_off0000e7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E2 16396 bytes
SHA-256: ff932e2e7134efdd7c4bfa2c34d40ac55e713e8fb2e004dba45459a13ac3df8d
font_02_sfnt_off0001122a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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