PDF malware analysis — malicious · 72facb8775e304e0

MALICIOUS

PDF

79.7 KB Created: 2021-02-01 20:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 7cf90353798cdc64125985265f5df9a1 SHA-1: 9bdd6da119f739da3066a28117811bfc7d988a42 SHA-256: 72facb8775e304e0b3eb85c621d7b80353821350dc6e4431b47cfb7151e2ff80

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this as a phishing or malicious PDF. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to potentially harmful content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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
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://leonvi.ru/123?utm_term=isn%2527t+it+pretty+to+think+so+tattoo PDF link annotation
- http://kubevevof.iblogger.org/performance_parts_5._3_vortec.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4482012/normal_5fdd311068f29.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4423195/normal_5fce5ad414b02.pdfIn PDF document text
- https://viwalamul.weebly.com/uploads/1/3/3/9/133997630/nanolidefara.pdfIn PDF document text
- https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/nolaroz.pdfIn PDF document text
- https://lisobigu.weebly.com/uploads/1/3/1/6/131606175/zararat_fakus_fonizibabekaro.pdfIn PDF document text
- https://mazerobuwi.weebly.com/uploads/1/3/1/3/131398334/sifobivez.pdfIn PDF document text
- https://naxibozagut.weebly.com/uploads/1/3/4/5/134580084/2953d79009b.pdfIn PDF document text
- https://ketuvukelese.weebly.com/uploads/1/3/4/3/134351906/0a03309a5ab3.pdfIn PDF document text
- https://tedarotola.weebly.com/uploads/1/3/1/4/131482933/7594913.pdfIn PDF document text
- https://gegadibiliwo.weebly.com/uploads/1/3/1/8/131871883/caf07d45f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424043/normal_5fd96a2a0847e.pdfIn PDF document text
- https://musisemikalig.weebly.com/uploads/1/3/4/6/134694348/5607126.pdfIn PDF document text
- http://pizidojokinesa.66ghz.com/oru_kuttanadan_blog_song_video.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://gejulakan.epizy.com/bfg_movie_in_tamil.pdfIn PDF document text
- https://s3.amazonaws.com/tobobowu/android_tv_remote_control_nvidia_shield.pdfIn PDF document text
- https://s3.amazonaws.com/luropiw/analyste_informatique_metier.pdfIn PDF document text
- http://wojudor.epizy.com/afaan_oromo_books.pdfIn PDF document text
- http://tuxefefili.epizy.com/busabivatuwutakegig.pdfIn PDF document text
- https://s3.amazonaws.com/wizidimawag/doxeji.pdfIn PDF document text
- https://s3.amazonaws.com/wuniku/os_cuneiforme_laterale_dem.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f0d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0D6	5012 bytes
SHA-256: `b453f03ed922b3c094023da91bc77c2a0aae0ab47703a6735abb730f5a1d2d3c`
`font_01_sfnt_off000101e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101E1	1800 bytes
SHA-256: `51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0`
`font_02_sfnt_off00010a6f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A6F	11524 bytes
SHA-256: `b46d2a85cd40e1b4a08dc5f3197042a1b1a280a95e30bc536c238c3c9a3120e5`

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