Malicious PDF — malware analysis report

Static analysis result for SHA-256 d172f3c987f7e213…

MALICIOUS

PDF

85.1 KB Created: 2021-07-03 00:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f40a19862f17bd2e025e3b945674755 SHA-1: 8d9ba543c76458613d3318381deec17d36fb47c9 SHA-256: d172f3c987f7e213886326bb22d1bbc3c936ac89b11f8e43fad2727bc15f52a0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS platforms. The presence of these links suggests the document is designed to redirect users to potentially harmful websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://interel-rus.ru/test/sites/default/files/file/mevozitimavemefon.pdf
    • https://austdoorcaocap.com/upload/files/kewumiruxuvalubojujebifim.pdf
    • http://medipharmacompany.com/userfiles/files/2686474785.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6ec90936e---70576112371.pdf
    • http://indianspringhomes.net/userfiles/files/sopubik.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d569b9db0---gusefaroputoluwaveso.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff1405b4c3---78164728555.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/da81e995e5d193d16201f4eac4be261d/91370473372.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/jomattkon4u3lf3607at21u2u0/kikufazoxusisix.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/bd8d6154db4bcb1a7de566178dbb0128/komed.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/29d23f04cb9b003fad1813b9a50393ec/gofabinugexasunurejowulud.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65e13a1f4a---jotekukezetikuxunijekexi.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/6ecc14e8fab0af990b802e954755bf5e/julubuludujexakomub.pdf
    • http://karunb.com/UpLoads/files/razinobedetozev.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad43c1dcad---37674187457.pdf
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/bepox.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/c084c2a4533a430c8bdf10c48da1f9c2/kejaxobo.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73a5a30a72---84640139115.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/3a810470ef0f347cc3c0fe9e90bb0f34/63379270284.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/62530e4eb4e2277e5bad198406dc7899/zotukibakivotanovone.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15f1cf0c81---86136357034.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/543da82e9438338a45d9c3b932e4417b/61643930758.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/92c0bebfcde074864e7a38158338bcb3/nigepudolo.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/fb8f791a9ad29cfbd451f9eda200a9e0/pajaruji.pdf
    • http://dancedynamicsla.com/clients/38740/File/xotufumujebis.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62272032f---18505723004.pdf
    • http://extintoresorigen.com/images/editor/lufedelisijo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=contingent+upon+financing
    • 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_off0000e958.bin
cdf902390dfcacc989efa0275c4f86ef919853217e6bea6fc2a5116a496dc07c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE958 10472 bytes
font_01_sfnt_off00010156.bin
f66997898ed17419ad27dd6a614e04493e099a635b82e6acad81daefdc307db8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10156 17324 bytes
font_02_sfnt_off00012eca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECA 16792 bytes

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