PDF malware analysis — malicious · 89dd8768317d5adf

MALICIOUS

PDF

85.4 KB Created: 2021-07-17 20:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 3e57834bff86e024d7f9880367144fac SHA-1: d39a89ba1dba5d9073371969c2d2e49984bb1b0f SHA-256: 89dd8768317d5adf13e022f1aedf96642d115e33bb89ca9cb8d48e6c9862d35b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm hosted on compromised CMS uploads and disposable domains, suggesting a phishing or malware distribution lure. No scripts were extracted, but the presence of numerous links to potentially malicious sites indicates a strong intent to redirect users.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

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 http://alt-1c.ru/userfiles/file/jijopexegixepeditusa.pdf In PDF document text
- https://a2designbg.com/userfiles/file/tetidulusinepisevi.pdfIn PDF document text
- http://namhungholdings.com/uploads/ckfinder/files/xogirujoxigujaduba.pdfIn PDF document text
- https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/a46a799a3a9d9ebd5ff43d723bb3c57d/remixet.pdfIn PDF document text
- https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949f59908f3---veremozefepatibotitajefex.pdfIn PDF document text
- http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/313f1d8809c3917b9b6c09d454e953ca/jebupi.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/c1h4ftbeq3ojmurfnb3e5cl8me/57094949616.pdfIn PDF document text
- http://suachuaspa.com/upload/images-content/files/rotifilifisisixasu.pdfIn PDF document text
- http://monkey-do.net/userfiles/file/lijofenomifuwimebina.pdfIn PDF document text
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097bf122df1a---61094969752.pdfIn PDF document text
- https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/a45c993565c317e6ea57a35196ca886e/25137017126.pdfIn PDF document text
- http://flemisterbauldingfamily.com/clients/8/82/82a21d9598fc66f9117a8fb7222c8fd0/File/fusupogixukikaxiruva.pdfIn PDF document text
- http://nomorecpapmachine.com/userfiles/files/kofis.pdfIn PDF document text
- https://oklogistic.lv/upload/file/worofufud.pdfIn PDF document text
- http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb9fdd9418---buzijerezevena.pdfIn PDF document text
- http://www.nachtruhe.info/up/files/zanojegogovav.pdfIn PDF document text
- https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/6m21u89rhbha4u9jtl9hdsvdpf/76890564009.pdfIn PDF document text
- https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/pvo3o4c9hlieg0s2ehseo9qsn1/fipukotapulakeja.pdfIn PDF document text
- http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9abf0e081---89544904751.pdfIn PDF document text
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d0555ae18d2---27507001795.pdfIn PDF document text
- http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0e5774bc8---punofuke.pdfIn PDF document text
- http://teckim.it/themes/userfiles//files/lenometilomavig.pdfIn PDF document text
- https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/fi70fubjfqk8j3sdutidgaia3t/5425028602.pdfIn PDF document text
- http://dailitara.lt/bites/uploads/file/6979761531.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=5+cm+to+mlPDF link annotation
- https://mediaget.com/userfiles/files/57957557891.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d46d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD46D	16168 bytes
SHA-256: `1cfb00680a8a18ef5d5af493cc5b57cfe410abeba37087ee2ecd799c98b61e68`
`font_01_sfnt_off0000ea09.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA09	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001021f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1021F	9672 bytes
SHA-256: `ff09b7bc8ee45fd3adbed32000538ac2d8a7c4b5e2099e8e075bbe4f13c4fc2f`
`font_03_sfnt_off0001172d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1172D	19236 bytes
SHA-256: `0af47f476a8ced351ce63bdb1d512d3391262441094b33fb07a9b96919e2212c`

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