PDF malware analysis — malicious · 9b7d13216e872057

MALICIOUS

PDF

85.7 KB Created: 2021-09-04 22:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: c8f249755e1eea757baebcaa1bb5398a SHA-1: 83b159d36ad756bf097b711dbce836790e897f15 SHA-256: 9b7d13216e872057c93babad491d7aa65a85787bceaa42e8545e2f52fc3bf85c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a malicious PDF detected by ClamAV and ML classifiers, indicating a phishing or malware distribution intent. It contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the PDF structure and numerous URLs point towards a phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=k+v+belsare+books+pdf PDF link annotation
- http://aire-limpio.com/img/editor/file/34669712249.pdfIn PDF document text
- https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/74a972d280a6c330d905f598b9a183c2/fixulubu.pdfIn PDF document text
- http://sashtraayurveda.com/ckfinder/userfiles/files/62581446773.pdfIn PDF document text
- http://bioident.pl/photos_fck/file/67500019540.pdfIn PDF document text
- http://igabana.com/upfolder/e/files/20210705014348.pdfIn PDF document text
- https://binarbaid.com/public_html/userfiles/file/95549518465.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ace4709e1---sivukotilar.pdfIn PDF document text
- http://zoop-tech.com/ckfinder/userfiles/files/61347270824.pdfIn PDF document text
- http://mobilni-kadernictvi.cz/files/file/34301579903.pdfIn PDF document text
- http://descanso.verareyes.com/ckfinder/userfiles/files/24885318852.pdfIn PDF document text
- https://kurtwohndesign.ch/userfiles/files/maxajetivu.pdfIn PDF document text
- https://calmoinc.com/upload/editor/file/61013319117.pdfIn PDF document text
- http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/099dbf5b20dc8d95a8b59889fb2f77f3/videvoburitogafimowidim.pdfIn PDF document text
- http://sameiroeventos.pt/ficheiros/pufuvejarodu.pdfIn PDF document text
- https://landatur.com/files/galeria/files/73207590293.pdfIn PDF document text
- https://ubk-sad.de/azubi/userfiles/files/kaxetefoz.pdfIn PDF document text
- https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/6193bbef4d18aaabd10fe3271cea367c/80321182990.pdfIn PDF document text
- http://letresorellebio.it/userfiles/files/tofoj.pdfIn PDF document text
- http://sweatrinserepeat.com/ckfinder/userfiles/files/ganisiwajasiwukoki.pdfIn PDF document text
- https://eltechma.com/zdjecia/fck/file/ritadobujudelim.pdfIn PDF document text
- http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/71924678434.pdfIn PDF document text
- http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607630914474d---zibobafajifawamugimu.pdfIn PDF document text
- https://nusantarabet4d1.com/contents//files/rugumowobomiwedobozur.pdfIn PDF document text
- http://avstralianature.ru/ckfinder/userfiles/files/59850605185.pdfIn PDF document text
- https://nguyenthelong.net/userfiles/files/xidifidivasapemabeke.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_off0000e949.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE949	10484 bytes
SHA-256: `b6141c5425124ceba0e82cb7827235580244da3e6bc043c17f949c98b1f656d7`
`font_01_sfnt_off00010113.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10113	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011925.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11925	18508 bytes
SHA-256: `9ed13ac978fdf48b79e10ec76c0c0e1b348565e10ae0284722b7980f49137e0f`

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