Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1d4ad41852d339…

MALICIOUS

PDF

94.2 KB Created: 2021-06-30 08:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9abc4db0f978705534e9a80c10931c83 SHA-1: cd2983e137ace1757570f9d5e3099f0daffb11ae SHA-256: ee1d4ad41852d33999f690cf415a6af1c8029f7b48ba07fb17d493f10a6b7042
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crewmak.ru/uplcv?utm_term=military+theory+and+practice+in+the+age+of+xenophon
    • https://vicotelecom.vn/static/source/images/file/domepinorafobizulawirov.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/4htpftaincvcpb54lml6jl9sd2/79930268567.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e52f0a21bd---disevafuxoja.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/n8m1bmd3vjjtltc3du1785ckik/wizarig.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/e87bb07b5ac8f2c9ba76421f25cb7587/porijabepuduz.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a370e4c6087---bibes.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7cf938465---gukiragefaxuver.pdf
    • http://shreyaghoshal.com/konadnew/userfiles/file/mulidifowigamukutivarovo.pdf
    • http://starlightcelebrates.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/lobufizikuvitafukixabiza.pdf
    • https://www.indoorclub-informa.com/boletines/img/file/14313050015.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cc1d5c853c4879e74503b4260a41ef59/82373099125.pdf
    • https://mimpiindah168.com/contents//files/20705333783.pdf
    • https://seerupit.dk/assens/file/49514232990.pdf
    • http://thedewakohchang.com/image/upload/File/2685685285.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9928361f---92556858486.pdf
    • http://stark-tools.ru/images/uploaded/85480901193.pdf
    • http://martom24.pl/martom/userfiles/file/lorezow.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/dd9142211d2f232d4d7ccbf5277c3668/93854480251.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160bd306277986---38693065757.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967ce9026ce---nolifosesej.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/b0e69b12cdbeb007bb41e02a301b1bfc/takivuxasefusavavoga.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d01692ccc---90885294735.pdf
    • http://aarogyamedico.com/userfiles/file/kaneminikelufexuniresop.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607187578b9a6---torodenukulotafumetireri.pdf
    • 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_off00010be0.bin
cbf4a260c086a01e9f4057e3e051fa76874b917eded1304b9a0748da6c9bc5f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE0 18448 bytes
font_01_sfnt_off000139ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139FF 16792 bytes
font_02_sfnt_off00015216.bin
f6ad709f046876d804a171013812d47b07187accdf55dfb19727a3445b3a68d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15216 10940 bytes

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