Malicious PDF — malware analysis report

Static analysis result for SHA-256 facc1d573cbf6eea…

MALICIOUS

PDF

77.1 KB Created: 2021-06-29 18:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ec3928737e8cf32d6baf57db676f30c9 SHA-1: edcadeff787cba31225ddf1016bda02a0c3f1552 SHA-256: facc1d573cbf6eea3d55f73d790a419aafade0e53c83ab7d347cffb64915cfff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting domains. The presence of external URIs and the classification as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution campaign. No scripts were extracted from this sample, but the overall structure and URL targets point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/s86t2q0sqee0bq3scl5tjob4a0/tafafazilefuwazugivinipi.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c18d90d6864---24986861675.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/526ef2jmjrvbn2irdrco3mess0/66794320191.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160944e17441b0---rirabepuk.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607beb845c778---96170953474.pdf
    • http://aj-logistics.com/stock/userfiles/file/34910239909.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607bae574fdd5---pitaxoj.pdf
    • http://feynburg-uhren.de/uploads/sakofibipekalewilo.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/545f02b4a839a34018cb43b27b03d2a4/43986195075.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/07d915d46a71be404f2108acb8519640/wajonumewasafipunonegi.pdf
    • https://baigiangtoanhoc.com/upload/files/41683537145.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/bf351ac308b23e32889394414be47d39/98664040299.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075788581fc0---92366348980.pdf
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/latewub.pdf
    • http://tokyoracing.hu/userfiles/file/wujezefijebamodarilipoxu.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf03daabc1---tageragir.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/88281842153.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16070f8e79b880---tujapomumonosune.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abdb1a9a046---gejikorofematogopeliw.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/c15af792e0c321e60081cff86d5f843b/xoxem.pdf
    • https://mimpiindah1.com/contents//files/36116258223.pdf
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/kubusadige.pdf
    • http://moto-bike.pl/userfiles/file/77955587547.pdf
    • http://ed-web.cz/userfilesfile/xofexutegetozokisurififok.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=diesel+tune+up+cost
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccc0.bin
bb701b5d3016f09e0bd9db8cf12a3119cd88577015500daee7e354d076f63f59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC0 10204 bytes
font_01_sfnt_off0000e3c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C7 16792 bytes
font_02_sfnt_off0000fbd9.bin
fc39a1a67481d7e3baed86a59cb386fe6bee8a4af2ce42a68be5e6a46675c316		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD9 16920 bytes

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