PDF malware analysis — malicious · ba44ce9d72a8ef02

MALICIOUS

PDF

79.2 KB Created: 2021-03-29 00:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: e8db685d8394fb0d583000af76575359 SHA-1: e923cd576432f4a542a51189cf17812a4ab42de8 SHA-256: ba44ce9d72a8ef028ce9eb2414f8fc817ff6b120d35222a63a11ff0aaead959c

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it contains a large number of external links, suggesting it functions as a link farm. The embedded URLs point to various domains, some of which are disposable hosting services, further supporting the link farm or phishing lure hypothesis. No scripts were extracted, but the PDF structure itself is used to host these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/strik?utm_term=does+windows+10+need+antivirus+2020 PDF link annotation
- https://puxibaso.weebly.com/uploads/1/3/0/9/130968956/1122078.pdfIn PDF document text
- http://eglo.club/h4n_zoom_review12kfn.pdfIn PDF document text
- https://foxejakepi.weebly.com/uploads/1/3/0/8/130874264/pinopuzamuvixut.pdfIn PDF document text
- http://mxsale.info/55963450205dv9qt.pdfIn PDF document text
- https://tixowofo.weebly.com/uploads/1/3/4/5/134592641/dalozekeve.pdfIn PDF document text
- https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/9942526.pdfIn PDF document text
- http://voicebftyi.com/pdf_to_autocad_converter_free_software_onlinemnq3g.pdfIn PDF document text
- http://serviceforyou.site/ingenuity_swing_and_rocker_targetqvpwk.pdfIn PDF document text
- https://sedanafijokam.weebly.com/uploads/1/3/4/8/134888359/2928592.pdfIn PDF document text
- http://openplafond.xyz/selalozepopabaga9quzu.pdfIn PDF document text
- https://foderojev.weebly.com/uploads/1/3/4/0/134041652/904382.pdfIn PDF document text
- http://mx50off.pro/6460346196687ohu.pdfIn PDF document text
- https://jasugigikimodo.weebly.com/uploads/1/3/1/3/131383258/gofupiwobelo-zelewepej-pavizikaborazu.pdfIn PDF document text
- https://burusezal.weebly.com/uploads/1/3/5/3/135306482/wawapubujazew-dipeduxejedasis.pdfIn PDF document text
- https://wunebometa.weebly.com/uploads/1/3/5/3/135314425/momabatutabowo_rixasex_vofusuto_rilulesepoxose.pdfIn PDF document text
- http://bigmagazin.xyz/zovudusejaru61n7h.pdfIn PDF document text
- http://haifaiv.ru/90117791871vi1zq.pdfIn PDF document text
- http://prizinsta24.space/4705369585370wbm.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://safadixuzet.rf.gd/96540763455.pdfIn PDF document text
- http://tavopaku.rf.gd/12134330704.pdfIn PDF document text
- http://durezalur.epizy.com/b_l_theraja_objective_book.pdfIn PDF document text
- http://pozonijegexovu.epizy.com/98647030686.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_off0000ebf9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBF9	5148 bytes
SHA-256: `668fc154c8035e34cfd2b90919483a9602bc494b31b222d06d6c8bda7facc82c`
`font_01_sfnt_off0000fd9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD9D	10452 bytes
SHA-256: `c2f61875b31dd81be5299ee2c23d6e424f73c8f37fbcfea363dafba8792f880c`
`font_02_sfnt_off0001214c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1214C	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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