PDF malware analysis — malicious · 2074e2563a893b19

MALICIOUS

PDF

84.9 KB Created: 2021-07-13 17:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 214acacdf764c9dec5247c0c70c6d392 SHA-1: ad3ee6023b67e75e4d18b1892d514c81cb986291 SHA-256: 2074e2563a893b1908b1a17030892a40120f15c5ee7ed000886f3bed618fb103

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised WordPress upload directories, suggesting a phishing or spamming campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is unreadable binary data, providing no direct clues to its purpose beyond its structure as a link farm.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

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://timebank.ru/sites/default/files/photos/pagefile/mereresevizadezefovo.pdf In PDF document text
- http://kayapaliinsaat.net/file/68265055918.pdfIn PDF document text
- http://chicohigh1987.com/clients/47015/File/fegonuko.pdfIn PDF document text
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/aae170bc79dfa2288dc3947fecdf809e/zokinokefibep.pdfIn PDF document text
- http://thebellingerfamily.com/clients/0/05/05034faaa501c69409a7459485cba135/File/9361407143.pdfIn PDF document text
- https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/nponcooisqn8f8972o8u02gta7/lusivijame.pdfIn PDF document text
- https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751f8b762d2---28804879227.pdfIn PDF document text
- https://berettyotv.hu/userfiles/files/regusumumanosaro.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85f591783---nuvawaf.pdfIn PDF document text
- http://creative-format.com/upload/editor/files/75080213250.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/aa08acd452579e8c4bf91d5b48acb2cc/97609445237.pdfIn PDF document text
- https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a525e07e999---madax.pdfIn PDF document text
- https://cvsc.co/userfiles/file/9813942073.pdfIn PDF document text
- http://vivo-mebel.ru/upload/file/27507282394.pdfIn PDF document text
- https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/37512016c373f9ed87253fb83bb884b8/mujuwedorekagisanil.pdfIn PDF document text
- https://flyags.com/editorResources/file///witozudasipepef.pdfIn PDF document text
- http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797afdb81ff---jexum.pdfIn PDF document text
- http://keacg.com/upload/files/ponodagutirivapovade.pdfIn PDF document text
- http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d6a324b0c---92463324635.pdfIn PDF document text
- https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/ro98jkb2g1ejchfccqv3h1oltu/vedisiga.pdfIn PDF document text
- https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d5a2b82ec---viwunidolitowosurogup.pdfIn PDF document text
- https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/b64d35ed6ac5938b74df66533615adc5/58919423401.pdfIn PDF document text
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/8344051a444007a48e393e10f4e4fce5/giralejesunifi.pdfIn PDF document text
- https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/0bqr3npep8ct760ngvjsut5u80/30342588259.pdfIn PDF document text
- https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075737d47bb9---12488638244.pdfIn PDF document text
- https://dotcomtravelegypt.com/userfiles/files/80205621860.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/2nti3ja15bd1643mj0bekiuah7/62717639784.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=whooping+cough+during+pregnancyPDF link annotation
- https://medlineplus.gov/whoopingcough.htmlIn 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_off0000ebdd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBDD	10688 bytes
SHA-256: `93becaa924e347cdaa22a13ca4ce6e0f21306b1131c502b84c9e7e4b759df80c`
`font_01_sfnt_off00010424.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10424	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011c36.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C36	16320 bytes
SHA-256: `92cb4468aecd0034d9eb04039d75af15c7ae2a40412d9f3aa91ac0de06549156`

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