PDF malware analysis — malicious · 587be3c2270e98a6

MALICIOUS

PDF

81.6 KB Created: 2021-09-11 23:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18

MD5: 7c80b2ea7bfe63f339eecbe9ad270b34 SHA-1: 568ac174f7200899ecbc01e20ba9cd53b73bd8e9 SHA-256: 587be3c2270e98a6fbddf258ff7b89115d99b5d4e560ea10d3703c7a1845dfc5

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, many of which appear to be link farms or disposable hosting, indicating a phishing or malware distribution attempt. No scripts were extracted, but the presence of numerous external URIs suggests the document's primary function is to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 5

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.
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=hiragana+keyboard+android PDF link annotation
- http://internationalnetworksolutions.net/files/In PDF document text
- https://menokatea.in/ckfinder/userfiles/files/44930430718.pdfIn PDF document text
- https://picinterior.com/ckfinder/userfiles/files/63273474454.pdfIn PDF document text
- http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613375dd8a166---lovemovenevowelowiju.pdfIn PDF document text
- https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/182fc3e04c3eeb95417dd18f3244e0db/kexobokikowijo.pdfIn PDF document text
- https://equinox-e.com/upload/UserFiles/file/51841510797.pdfIn PDF document text
- http://burattinojatek.hu/userfiles/file/xiwerabawufudodeb.pdfIn PDF document text
- https://olboihorgaszto.hu/editor_up2/24296793039.pdfIn PDF document text
- https://commonwealthsportsawards.com/userfiles/file/suginasozolujomesaku.pdfIn PDF document text
- https://kindeeyudee.com/ck_files/files/dimipu.pdfIn PDF document text
- https://ozora.schaffsen.com/contents/file/76948602002.pdfIn PDF document text
- http://luxlustry.ru/img/upload/29264569374.pdfIn PDF document text
- http://konemara.hu/userfiles/file/pabaxinomameta.pdfIn PDF document text
- http://lacasedescaraibes.fr/file/tipavuvokego.pdfIn PDF document text
- http://xycrusher.com/d/files/9437185266.pdfIn PDF document text
- https://femagnet.com/upload/edu/article/file/81629451609.pdfIn PDF document text
- https://searchlink.org/userfiles/file/1929998414.pdfIn PDF document text
- http://www.ondebiz.com/userfiles/file/ranupam.pdfIn PDF document text
- https://turismo-galicia.es/ckfinder/userfiles/files/weferevokafodafisudimoso.pdfIn PDF document text
- http://jingluo.net/uploadfiles/files/kavewogodowes.pdfIn PDF document text
- https://unibel.pl/pliki/upload/file/3930411123.pdfIn PDF document text
- https://jills.reviewz.eu/app/webroot/files/userfiles/files/61541573463.pdfIn PDF document text
- http://proallprint.com/userfiles/files/birozozabegitiluta.pdfIn PDF document text
- http://donghozibistore.com/luutru/files/42099782064.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_off0000d05b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD05B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e86d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE86D	21956 bytes
SHA-256: `3a95cea920cfb5d85bce8ac69e666098bcfeb24e92f8d87a824b091ba5a65789`
`font_02_sfnt_off000121ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121AD	10448 bytes
SHA-256: `6613e8371013c15aa6b55088f1eb240ee7ac452e27cf74868342ff29ed1a75bd`

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