Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f05b42a58d4de8a…

MALICIOUS

PDF

85.7 KB Created: 2021-06-26 23:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: baca8086a653a96a8bf4b1e2c00c492a SHA-1: d97b456af26b78669ec44d4a82adb6a34cadb4e2 SHA-256: 2f05b42a58d4de8a49f6c8cb091567bb0e004cbaa695ad989f952bcc1088dfb3
176 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with multiple URLs pointing to compromised WordPress sites and raw IP addresses. These links likely serve as lures to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/lj8tbk3jbns90tiaoo9ekpk4j3/poseparum.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a85dc54af5e---69322244272.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160ac83887fc21---18740238793.pdf
    • http://sva-jeanroze.com/xmedia/file/bewatitite.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c0a6d2f09---15906201497.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/6103e412a3fe3cf7baed42841a2a453a/duwegepabadi.pdf
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/bovojodap.pdf
    • http://worldwidefilipinoalliance.com/uploadedFiles/files/tigekenejukaninerevanag.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/faaed49a0c983ec305ab80acf3b63f2b/21946411860.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080d8c7b3795---dodutiluxowutijibojukike.pdf
    • http://jnnycc.org/userfiles/file/92018258030.pdf
    • https://studiorampinelli.com/file/kenerowolepininorusa.pdf
    • https://seitonsolutions.com/ci/files/lupuwediravovek.pdf
    • https://hanul-muresenilor.com/wp-content/plugins/super-forms/uploads/php/files/9i2ib01t4eodioore0shl00qtp/67973204220.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/v9fjv0pj3kt59q0ecpu76j28i3/62166481854.pdf
    • http://kolkandkolkdesign.com/site/data/ws/files/sozupanivejosobaz.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/ba8ba6ca66d1f7f0741b27fd0950e6a6/raparuxorikedisunodineli.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9243a29be---nixugaj.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/92223145812.pdf
    • https://highrise.pl/file/wiwiguzekopoxuzadapax.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/03913bb9797fd97be5eb41ba7996d74f/88416914984.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/565e8c0ad225f1244d197216335f9f50/41453295006.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbdd9a9bf5---13611754683.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/f7bf16875d5409f7e92b6882999a2516/rebusiwos.pdf
    • http://circuitoinsulargc.com/documentos/file/28880317077.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=world+rabies+day
    • 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_off0000ec8e.bin
403bf409b312c394beeb0e69c7ddb1517320d4c62422d5755c2c3087bfd18ed6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8E 17540 bytes
font_01_sfnt_off00011ab1.bin
28258d82e1b7a5b84a97ed685cbd1405fcb2143c8be2daa2b382fc53b4c6a0d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB1 10284 bytes
font_02_sfnt_off000131ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x131EE 16792 bytes