PDF malware analysis — malicious · c945980a27423c57

MALICIOUS

PDF

81.1 KB Created: 2021-06-28 13:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: dd34c014caf87fc482237f1a1077a618 SHA-1: 5e63086b334ba863189cb40ceec99b8a07805751 SHA-256: c945980a27423c57bc8c8b86c6017845944f2b953a0b00bc9cd4761d9a60de7c

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress installations and disposable hosting, suggesting a phishing or malware distribution campaign. The embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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 https://nomylo.ru/uplcv?utm_term=the+term+uremia+means PDF link annotation
- https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/de11201826a348fd320b379f18b403f1/8175051956.pdfIn PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740901a12d6---72709522177.pdfIn PDF document text
- https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac99e8c7e8---weredagikamojopapi.pdfIn PDF document text
- https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/76c778543ccf8b7dc4e1df7f37e2d236/39729947960.pdfIn PDF document text
- https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0931b134c---50227718141.pdfIn PDF document text
- https://bestofbucerias.com/upload/file/wumajixibuxitekit.pdfIn PDF document text
- http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160d62765e552c---senori.pdfPDF link annotation
- https://ewastexperts.com/userfiles/files/8036736919.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/40fa92a99d773d9491e152adc43219e1/71306943303.pdfIn PDF document text
- http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a321243b58a---4568610203.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/53d8df21cebc7024b0910c4b40ae8003/pavedajijuda.pdfIn PDF document text
- http://almar-bus.pl/userfiles/file/40533206727.pdfIn PDF document text
- https://balajitutorial.com/admin/userfiles/file/kokanutileviludaxajuki.pdfIn PDF document text
- http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606efea4c4fe6---98336232802.pdfIn PDF document text
- http://airlineclassof66reunion.com/clients/c/cb/cb51827d251551eca15067b3b23580a4/File/27608278256.pdfIn PDF document text
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28614251a0---luberi.pdfIn PDF document text
- https://laughteronlineuniversity.com/images/upload/files/ronir.pdfIn PDF document text
- http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d551bd8d963---9340935646.pdfIn PDF document text
- http://naturallabs.de/userfiles/file/tigevidekefusomenamiv.pdfIn PDF document text
- https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/74e45b99d5e1488097582e1de0fdb0f7/15967324950.pdfIn PDF document text
- https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/7agg2qirk7ilupm0e9t9mb0fe0/88322063425.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/kj25cqc4ptvqe9un66jv9gu6qa/jumamorap.pdfIn PDF document text
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf715dc34---kuvadinososuxesowiboser.pdfIn PDF document text
- http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8a0d5d0855---gewibokazufi.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_off0000dd3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD3C	16680 bytes
SHA-256: `d3f5cb6bae550773936b338b99dcec0da2c4662a40d6de5602cd240815ed56a6`
`font_01_sfnt_off0001086f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1086F	10268 bytes
SHA-256: `627312d3cc05ec73eeb9bedb716520f5fa101f9d31f9206460044610d9ab10a7`
`font_02_sfnt_off00011f59.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F59	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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