PDF malware analysis — malicious · 1f9811e3f324f755

MALICIOUS

PDF

94.8 KB Created: 2021-01-20 07:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 38ff1e4da3e59d24dfb5d2c46c8437ff SHA-1: ccd39727af3e90c1cf163d0bdd0b8463ae9f2f06 SHA-256: 1f9811e3f324f7555db99d76c8cb63d092fe32949b4e2b8b8298d65bdc383218

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as a link farm containing a mass of external links, with a high ML score and ClamAV detection indicating malicious intent. The document body is heavily obfuscated and appears to be non-readable content, but the presence of numerous external URLs suggests a phishing or SEO manipulation scheme. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://trafficel.ru/123?utm_term=personal+faith+journey+statement PDF link annotation
- https://static.s123-cdn-static.com/uploads/4472481/normal_5fca6e5d9ffd7.pdfIn PDF document text
- https://peruvapi.weebly.com/uploads/1/3/0/8/130813059/benofidozoxo.pdfIn PDF document text
- https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/e9ed3.pdfIn PDF document text
- https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/nipetamuxisi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404964/normal_5fdae4857ff6f.pdfIn PDF document text
- https://site-1178208.mozfiles.com/files/1178208/arcade_donkey_kong_emu.pdfIn PDF document text
- https://janodapos.weebly.com/uploads/1/3/1/6/131636969/3268087.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367631/normal_5fad7c2ae1ca6.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4479240/normal_5ff4eb9b78caf.pdfIn PDF document text
- https://puxizabub.weebly.com/uploads/1/3/1/4/131406372/rosabumumiloged-xawilotubasar.pdfIn PDF document text
- https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/nesamuwimuxepo.pdfIn PDF document text
- https://site-1167964.mozfiles.com/files/1167964/magic_chess_bang_bang_mod_apk.pdfIn PDF document text
- https://zoredufuno.weebly.com/uploads/1/3/4/6/134638801/jarafozuduruzosigupo.pdfIn PDF document text
- https://vokijovagugudis.weebly.com/uploads/1/3/0/7/130776016/c4c27ef7f87.pdfIn PDF document text
- https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/f7856a6d81c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368229/normal_5fba72ef5d3d7.pdfIn PDF document text
- https://relakurofur.weebly.com/uploads/1/3/4/8/134872141/sadedarobomobu_lovevevoke.pdfIn PDF document text
- https://site-1194081.mozfiles.com/files/1194081/call_recorder_app_karna_hai.pdfIn PDF document text
- https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/vagexijo-zizev.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_005_off00014092.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x14092	24100 bytes
SHA-256: `b6a1104b730a49b98858a9eddbaf614e5664b5a5ea479212f08d88ece7fd4eab`
`font_00_sfnt_off000108fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108FC	5184 bytes
SHA-256: `b0a715d43032b476f9d72eea37ded615a9dd825814ed56ba830a318212464d97`
`font_01_sfnt_off00011a85.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A85	11096 bytes
SHA-256: `cabdbc825658068b230f505f3c77bbf9ec7a37c7c685289f18d72cd703b78038`

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