PDF malware analysis — malicious · a87e0f8f2cd32da1

MALICIOUS

PDF

94.9 KB Created: 2021-06-28 00:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: aaabaa353f3a13e11b1276de8bff1cec SHA-1: 47e984c67077fca8787a0055cfc1b414a2559f68 SHA-256: a87e0f8f2cd32da18a74bab6fad86a3de7842b8a4f7f453ed17d51c2ade874ae

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9918

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://nomylo.ru/uplcv?utm_term=red+spider+lily+tattoo+meaning PDF link annotation
- http://www.northern-japan.com/image/upload/File/23409882614.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/7abseg2r6glu9bl7hkrl4aob1s/76910100191.pdfIn PDF document text
- https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/vbbo3smq0mjm3n6s77aqg8v0it/zidunegejugusozomo.pdfIn PDF document text
- https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086991e2411d---30543573228.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608a76174bb50---pirewa.pdfIn PDF document text
- http://gtshotel.it/images/file/nivipajerupugabaw.pdfIn PDF document text
- http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/visukezasorib.pdfIn PDF document text
- http://harchovyk.com/userfiles/file/foruvi.pdfIn PDF document text
- https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/2f3e9758d193aaa05afd734368e49012/70401613397.pdfIn PDF document text
- http://soluzionebenessere.eu/userfiles/files/17058904331.pdfIn PDF document text
- https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c2f2817d9---6082417625.pdfIn PDF document text
- http://naturallabs.fr/userfiles/file/80532553441.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09d2ec248d---81739461545.pdfIn PDF document text
- http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607fda6422ce0---balegosemilipozanibaxoda.pdfIn PDF document text
- http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c5396178---69830861202.pdfIn PDF document text
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/a83ec3fe3b8c441d859c5554fd455ff1/31465794820.pdfIn PDF document text
- http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a72ec17b7---woxafivodoruveledi.pdfIn PDF document text
- http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160760f581ad57---71480178640.pdfIn PDF document text
- https://hzautomatisering.nl/userfiles/file/90900007133.pdfIn PDF document text
- http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89a8fbac3f---28759853804.pdfIn PDF document text
- https://coluer.ir/documents/file/mufodiwud.pdfIn PDF document text
- http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b42b5014379---vurimozisolotiwabam.pdfIn PDF document text
- https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cef3bd3e0c---xidojefaze.pdfIn PDF document text
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/elh6e7bih5ksod1l5afpn61l17/timofe.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f9e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9E9	10892 bytes
SHA-256: `098dff5f63b7a4b13e321588c60712e0bd942c99012f98c2336fcc31755e63f1`
`font_01_sfnt_off000112e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112E3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012af5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AF5	17520 bytes
SHA-256: `c6563354e9c3a00239837099862e53ea862e26291ec457cd7ed38dddc4f8db16`
`font_03_sfnt_off0001589b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1589B	5592 bytes
SHA-256: `a066325f7039851d2f926798367a3b2003750c0b5705d586194f853826ff0518`

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