PDF malware analysis — malicious · 5e25e6eef4360f1c

MALICIOUS

PDF

97.4 KB Created: 2021-09-08 08:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 75748be5b25563dd2746fb8552902704 SHA-1: e7253695b9a4915fb873751e3065f86939e7b5fe SHA-256: 5e25e6eef4360f1c0eee17a9c384d302824005119266c8f64fdedaedae986b6f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and other domains, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a likely phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9879

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://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/5ec1116dedc99813ae248b26245268a7/34797459100.pdf In PDF document text
- http://fultonhighschoolclassof1977.com/clients/a/ad/adf64365ba34d951c098eb677b062caf/File/84140888203.pdfIn PDF document text
- http://xboxheerlen.nl/userfiles/file/fagipudej.pdfIn PDF document text
- https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/7fd5479a6cf389400531226c6cb5ed85/99764333811.pdfIn PDF document text
- https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116ef3d0f52f---jovumijoxamogirave.pdfIn PDF document text
- https://detectiveoffice.net/userfiles/file/13212331281.pdfIn PDF document text
- https://reha.bg/content/upload/file/41964158490.pdfIn PDF document text
- https://livres-arts.com/ckfinder/userfiles/files/33344714831.pdfIn PDF document text
- http://fincasotilloviejo.es/files/sotillo/_repo/file/viralifakotejipalupuwinel.pdfIn PDF document text
- http://digilit.ir/basefile/digilitir/files/19671680016.pdfIn PDF document text
- https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/j73ga8ecmnhnfbbno09i8tmfpr/bolowujisadurapo.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160e9439784e77---savakar.pdfIn PDF document text
- http://28777886.com/Lpf/UPFILE/userfiles/files/8876432792.pdfIn PDF document text
- http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cec5455ac9---65347536365.pdfIn PDF document text
- http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160714682b3cbf---vujixemepozetikusipen.pdfIn PDF document text
- https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/1bbac4a40cb1800eb6bb76df1aa6bd26/tanozanemimewanuwinit.pdfIn PDF document text
- http://wf515345.tw/CKEdit/upload/files/69467964102.pdfIn PDF document text
- https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/ltqqat4ccia2gvabtkcu4r1s1d/luwirudezovunaderisarot.pdfIn PDF document text
- https://krygina40.ru/UserFiles/File/1622834582.pdfIn PDF document text
- http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b6ead4d2c---21547483717.pdfIn PDF document text
- https://avukat.dnsaktif.net/upload/files/79466306114.pdfIn PDF document text
- https://net-mex.hu/ckfinder/userfiles/files/5101645715.pdfIn PDF document text
- http://homenet-spb.ru/userfiles/file/70324242390.pdfIn PDF document text
- https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/o86e0874sa3sbmd6csieuu23tm/legugexoxevuxezidexox.pdfIn PDF document text
- http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/82180285157.pdfIn PDF document text
- https://eseninternational.com/uploads/files/93519940386.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115b365de740---josakemanakibokun.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=sampling+procedures+pdfPDF link annotation
- 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_off0001198a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1198A	17136 bytes
SHA-256: `6b330169e6727595271715cd9f6190bfdb49857c95cecee2011a2061fd7bed1b`
`font_01_sfnt_off00014642.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14642	11040 bytes
SHA-256: `04e8b8c268b925e61907c96715c192d33a4401cb2366a20e6d4de69bda399102`
`font_02_sfnt_off00015fa5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15FA5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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