PDF malware analysis — malicious · 11773f1855f73530

MALICIOUS

PDF

82.5 KB Created: 2021-09-18 09:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 1019a3c9707c14f433ed78d3743aefe7 SHA-1: 6359a513424fcb8c53bab9b99ff8354efb8801c8 SHA-256: 11773f1855f73530d41ac3498dc1bab7f8140b6a9db5283300c85faac6f3ba15

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and external URI redirection. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm on disposable hosting, further indicating malicious intent. The embedded JavaScript likely facilitates the redirection to malicious URLs found in the IOCs.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://wastran.ru/uplcv?utm_term=redmi+9+power+vs+moto+g9+power PDF link annotation
- http://jolanyee.com/upload/files/202109172105016906.pdfIn PDF document text
- https://undergroundtakeout.com/userfiles/file/mudosovixegewudodifufedux.pdfIn PDF document text
- http://hftyby.com/upload_fck/file/2021-9-10/20210910033728242908.pdfIn PDF document text
- https://escolaalfa.com/userfiles/file/32133860094.pdfIn PDF document text
- http://nenayu.com/filespath/files/20210914110101.pdfIn PDF document text
- https://www.hemingway.bg/app/templates/js/ckfinder/userfiles/files/83250312173.pdfIn PDF document text
- http://beverly.kopanramen.com/uploads/files/zadudejojelitugujefid.pdfIn PDF document text
- http://zerosquareonline.com/file/92333070926.pdfIn PDF document text
- http://vandervalk.reviews/app/webroot/files/userfiles/files/96625272561.pdfIn PDF document text
- http://gutachterbewertung.de/userfiles/file/viludegi.pdfIn PDF document text
- http://colafranceschi.it/userfiles/files/vizakeguforupux.pdfIn PDF document text
- http://groupelamiri.com/uploads/FCK_files/file/safofoz.pdfIn PDF document text
- http://chekeeh.ir/basefile/chekeehir/files/guwotazawapemifap.pdfIn PDF document text
- http://blankheich.de/images/uploads/file/59948306626.pdfIn PDF document text
- http://elverum-revmatiker.no/images/file/14370200322.pdfIn PDF document text
- http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142426a139eb---samolepam.pdfIn PDF document text
- http://misr-consult.com/userfiles/file/nabikilonekuxoribaki.pdfIn PDF document text
- https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/rgqjcikgjh5v5i4r7ppn6gocrs/48665244454.pdfIn PDF document text
- https://mamo-tato.ro/userfiles/file/75312308067.pdfIn PDF document text
- http://haozuowenwang.com/imagefiles/file/71771200596.pdfIn PDF document text
- http://qianshunqs.com/admin/upload/pobodi.pdfIn PDF document text
- http://kubablimel.pl/Image/files/40713975554.pdfIn PDF document text
- https://hotelite.in/userfiles/file/58492695233.pdfIn PDF document text
- http://technoauto.jp/js/upload/files/95112209764.pdfIn PDF document text
- http://collectifff.be/imgdb/accueil/files/zuvulumobefujegupijize.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_off0000da9e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA9E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f2b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2B0	18640 bytes
SHA-256: `43b6e088b7bd1ae9f275bf0723b2cbc1556cd0661c1c52639035365f42f8e449`
`font_02_sfnt_off00012377.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12377	10788 bytes
SHA-256: `0ec0555d96e19923f0e8a286348a9fe37590c1169fd373ccdc52126a86eee433`

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