PDF malware analysis — malicious · d292c81e48afe26f

MALICIOUS

PDF

79.4 KB Created: 2021-07-15 20:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: c1156a669199dd9cb3f1fb0aa4b4c8d9 SHA-1: bd62d1ecba60f7bd7c5e00be3dcea37272b306e0 SHA-256: d292c81e48afe26f424ccc5af1e6fc882dd54a14bb2f0fae69ab440df091b092

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. The presence of 'utm_term' parameters in some URLs further supports the idea of tracking user engagement with potentially malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://medvor.ru/uplcv?utm_term=feria+color+booster+tube+instructions PDF link annotation
- http://niszczeniewaw.pl/userfiles/file/43856728276.pdfIn PDF document text
- https://hurghadalife.net/userfiles/files/vezojirosopivimi.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/t7dlod9s7qth521ki2dfeoqaa1/xewekifusosowe.pdfIn PDF document text
- https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/ff8b443fcfb3d14cfa00d336299659ab/73936319217.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c60e6647d---52241621620.pdfIn PDF document text
- http://harchovyk.com/userfiles/file/zavuj.pdfIn PDF document text
- https://estoniapools.com/contents//files/79002027808.pdfIn PDF document text
- https://carparts-fixture.com/file/file/fixigifesumupukizekipi.pdfIn PDF document text
- https://bevillelecomte.ovh/ckfinder/userfiles/files/51824681615.pdfIn PDF document text
- https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/899c633a9e5e693cb1682dcfabf7aefa/98431709536.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9f7479f41---33635594994.pdfIn PDF document text
- https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/e7630cf33c8efc6fcbb1280473db8a0c/2462811138.pdfIn PDF document text
- http://bbmeti.it/userfiles/files/62438815619.pdfIn PDF document text
- https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc9f83b53ea---77401593282.pdfIn PDF document text
- https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/e0f15546fd21ae65250e125a081044d9/5414441772.pdfIn PDF document text
- http://cphs1970.net/clients/877309/File/81100926884.pdfIn PDF document text
- http://akinmedical.com/uploads/file/91879308766.pdfIn PDF document text
- https://privatecambodiatour.com/userfiles/file/89676197001.pdfIn PDF document text
- https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/9kr1qf8jqcvmqreifcue74ac6g/5755055006.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f2080bfe9---82670122427.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/gej2lf0kehd383v80hktfc0pv0/rabajururigobuk.pdfIn PDF document text
- http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d98dd3da8---27617574025.pdfIn PDF document text
- http://i-dron.cz/data/file/25513988139.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_off0000d252.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD252	16952 bytes
SHA-256: `ba7096194fc4066db61fd94c712796b5c05aaf5cd32157664351676ed7f53175`
`font_01_sfnt_off0000feab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEAB	10440 bytes
SHA-256: `71e9087a385dea023912c67eeedd35b33b3fd6031900a98f2859a48d505e6119`
`font_02_sfnt_off00011674.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11674	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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