PDF malware analysis — malicious · ac41c45e809af63a

MALICIOUS

PDF

72.6 KB Created: 2021-09-28 11:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 1b630f4f0977c372200dc176a969a09e SHA-1: b65151a5dde792076cb640b001415ac8fb790137 SHA-256: ac41c45e809af63aa432d4ba7cbae1f4647c038c62b993b41c04038afd334401

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was identified as malicious by a machine learning classifier and ClamAV, indicating it is a phishing or trojan PDF. It contains numerous external URIs and link farms pointing to potentially compromised or disposable hosting, suggesting a redirection scheme to malicious sites. No scripts were extracted, but the PDF structure itself is leveraged to host these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9908

Heuristics 6

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.
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://pixomot.ru/uplcv?utm_term=a1+xplore+tv+chromecast PDF link annotation
- https://valerart.com/ckfinder/userfiles/files/17898691547.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f35b7d1017---76294454417.pdfIn PDF document text
- https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130087cefc5c---22564210977.pdfIn PDF document text
- http://vipnovini.bg/root/f/uploads/files/wunalusuzilumalikena.pdfIn PDF document text
- https://getracemirates.com/userfiles/files/gugesuwizekinukilu.pdfIn PDF document text
- http://jogagongu.pl/userfiles/file/nojujisipodokolewijufas.pdfIn PDF document text
- http://autosoftware.company/autoresponders_images/files/tisujebifisamerawekivemov.pdfIn PDF document text
- http://risorsaterra.it/userfiles/files/mibudad.pdfIn PDF document text
- https://golf-tout-terrain.com/publish/page/file/sosejovis.pdfIn PDF document text
- https://silverbirdmarketing.com/pages/images/file/78134286807.pdfIn PDF document text
- http://appli-veolia.net/ckfinder/userfiles/files/natenebodezofi.pdfIn PDF document text
- http://thementalhealthadvocates.org/files/userfiles/file/fejutaligitakabewatareri.pdfIn PDF document text
- http://teresachild.com/upload/files/24429952530.pdfIn PDF document text
- http://kukdae.com/files/fckeditor/file/wababorejasupabubojonax.pdfIn PDF document text
- https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/67db872a2b1e08c8f6023c72d98e451b/67032525380.pdfIn PDF document text
- https://jphotographyllc.com/userfiles/file/tobebemulikezimov.pdfIn PDF document text
- http://healhumanity.foundation/userfiles/file/51865191860.pdfIn PDF document text
- https://fundacjaartfreeart.pl/userfiles/file/85278846970.pdfIn PDF document text
- https://aventura-agence.lu/userfiles/files/sogud.pdfIn PDF document text
- http://doubler-son-capital.com/photos/files/jedobugomojabavose.pdfIn PDF document text
- http://laibros.com/ckeditor/userfiles/files/73402429123.pdfIn PDF document text
- http://deshdunya.com/blogimage/file/xogir.pdfIn PDF document text
- https://www.funes.gob.ar/ckfinder/userfiles/files/nadelotiwezuximabisise.pdfIn PDF document text
- http://pusheng168.com/uploadfiles/20210916120246.pdfIn PDF document text
- http://aloisiquadri.it/userfiles/files/nulifonopazajuk.pdfIn PDF document text
- http://www.lbtfilm.com/uploads/files/zijinuzawi.pdfIn PDF document text
- http://jjburgerut.com/uploads/files/70473719551.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b730.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB730	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cf42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF42	17436 bytes
SHA-256: `6242cb7746d95a32427a82bd25575877ab6727ae029230ee1e149c759e36151b`
`font_02_sfnt_off0000fbbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBBB	10644 bytes
SHA-256: `b94ef9f67317933930e885784fa40bd3b38e9688740181d141690caabf7b1f98`

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