Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4000af17639cc42…

MALICIOUS

PDF

100.9 KB Created: 2021-07-01 23:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 654f9a1f27480e1b70fdb34c60759d8f SHA-1: a5e1818a3f690bb235a4f0d56388514ba2e238aa SHA-256: c4000af17639cc42706a557ca362630fabaedb4aa87f5f88ae6a30cfc8687822
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious and exhibits characteristics of an advance-fee scam, likely involving a fake lottery or parcel delivery. It contains numerous links to compromised WordPress sites, suggesting a tactic to host malicious content or redirect users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9358

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e55a29b688---zudipuwesadalapotabivito.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/e3e258da38f0e99b191bddf1ab4e7542/86463442804.pdf
    • http://munsusa.org/userfiles/file/20210625091219.pdf
    • https://grup-insaat.com/userfiles/file/nemovasoz.pdf
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/25139953940.pdf
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/runadipafutidekewogeful.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/irdhrfnkcjk35bu8ehq1mhtkc5/jozudezu.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/521beb02ee994a2e5dc2a91ec26a67e0/82909453815.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/1s05ffts8f4q2iif1052p47ob4/92613993026.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcc803ac07---tasugizasegewejederel.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/64qi8k4ea20ikavnmtvo8459bs/rebagotafowegozasijo.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/a0a53c6d48d3e375c0c7bc677252523a/peboter.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d9832d2d629---berudimuzolezujodemab.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e6368bb9---sivebojokagejakonubefija.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607085208b688---najusivatukokax.pdf
    • https://infrastone.com/userfiles/files/54645239322.pdf
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/fojor.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/4a8d45fe848227f07ddc0ddfde5e8f6e/dijotukabufaminu.pdf
    • https://contabil-fiscal.ro/mm/file/34219551653.pdf
    • http://www.bandungmesin.com/file/48510060031.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c50e20ef6---potebu.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c42f56be30---lugitozimifuwosowogedida.pdf
    • http://aftckwt.com/uploads/file/97522892170.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/e4872270217b4863cbf53253f22b2bb0/96029967477.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/8428228fdb579256ad0d2a4e73651bcc/ninugulirirexojuxanatu.pdf
    • http://landia-print.com/pdir/file/26914715932.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=accumulation+meaning+in+english
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001051c.bin
0185d2ac674f82d20b14138693fb59c29912ac4c6a1acdff92a79c250ac71cae		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1051C 18360 bytes
font_00_sfnt_off0000ed0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED0B 16792 bytes
font_02_sfnt_off000122e0.bin
83b2188b5fcdfe1d1cc33ce754a7c783553ff41bd09148f5c96772fa5e6dbe02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122E0 23316 bytes
font_03_sfnt_off00015d9a.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D9A 3464 bytes
font_04_sfnt_off00016b1a.bin
3532b92f3bafb2c63e9c7977fb8a94823f2a32644dcdf8fcf2d5dce71631722b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B1A 10660 bytes

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