PDF malware analysis — malicious · 5a3fd15daaaec2b5

MALICIOUS

PDF

72.1 KB Created: 2021-09-05 11:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 78282c2b896560925824e3848a63af18 SHA-1: 96f3d20a2dac2e2fd8db4b425827e609ce2a797b SHA-256: 5a3fd15daaaec2b53c3596212e716a655a2f82bf532073d5fd974ca556fa08b4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely to lure users into phishing scams or download further malware. The `PDF_SEO_DISPOSABLE_LINK_FARM` and `PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM` heuristics confirm the nature of these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9902

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://irlanc.ru/uplcv?utm_term=pmdg+737+ngx+manual+gear+extension PDF link annotation
- https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/56b85a253afce78063d69050127a954a/bofujigi.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/v2es0meild57ud9ju8l2hcprnd/71803384262.pdfIn PDF document text
- http://computerdoki.hu/user/file/jefujoxunovivife.pdfIn PDF document text
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/gcf4i5r9oajjm03bk9su8c0860/79975384804.pdfIn PDF document text
- http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c316a806b16---warebosowijajitokategi.pdfIn PDF document text
- http://nbkhjc.com/uploads/202107/file/210731081632717629zoyfb2dviudt.pdfIn PDF document text
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1712191f3---gazofisenegikopemilo.pdfIn PDF document text
- http://dekoblickfang.de/userfiles/file/23376115290.pdfIn PDF document text
- http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/85538305762.pdfIn PDF document text
- http://theleadershipworks.com/PO2/UPFILE/userfiles/files/99255000798.pdfIn PDF document text
- https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcd20dcb19---2870609848.pdfIn PDF document text
- http://olddieselparts.com/ckfinder/userfiles/files/robisekirekizi.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2dc246a48---wulukefalit.pdfIn PDF document text
- https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611fe2dc153a9---42623355057.pdfIn PDF document text
- https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41b1268ec9---67597108778.pdfIn PDF document text
- http://amy-tsai.com/images_express/userfiles/files/pewonojiwomivoboruxaruki.pdfIn PDF document text
- https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/j62beao7p1sme42q6oabo2loir/dovudexuzunufejidexo.pdfIn PDF document text
- https://digitaldaya.com/imagenes/file/30093424548.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/vu9va9oebm2ridhjapvnhbk7o6/bizopunoxiworofax.pdfIn PDF document text
- https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/8903c57e46926f0f373487f21fb5f714/saxuwexujanawitepaviju.pdfIn PDF document text
- http://afgventuregroup.com/cfiles/file/2960893785.pdfIn PDF document text
- http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307dfb6b520---moxaradevuxigagozigazaj.pdfIn PDF document text
- https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb459785a8d---rigewuxijinajizumebusu.pdfIn PDF document text
- https://drivetripper.com/userfiles2020/files/13285697619.pdfIn PDF document text
- http://benthanhsgfarm.com/images/uploads/files/jeguvodebagedot.pdfIn PDF document text
- https://spacio.hk/attachment/file/51897857591.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_off0000ba32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA32	11016 bytes
SHA-256: `c968d5441d9f80a0e1d685a9e376565344f1538fb69b31c18e88490b30fd6658`
`font_01_sfnt_off0000d3b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3B4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000ebc6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBC6	14980 bytes
SHA-256: `c5355be875406396ef9ab3092f3a1cf8b6f638edd91cd7e1d7f41f5448ea336f`

Open this report in the interactive analyzer, or submit your own file for analysis.