PDF malware analysis — malicious · a3690adbc5089d0d

MALICIOUS

PDF

87.7 KB Created: 2021-06-02 13:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: e109ae6d4692217f49632fbc4efa2960 SHA-1: 64fa3fea5e72f5528eafb0e09e8684ec3aa92051 SHA-256: a3690adbc5089d0d1a6bc48f777c87fdface1a2a44b36a0b80951f8f4117d60e

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or phish users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score further support its malicious nature. The document body, though heavily obfuscated, contains references to 'catia v5 full crack 64 bit', indicating a lure for pirated software.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

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://gimoguvi.ru/123?utm_term=catia+v5+full+crack+64+bit PDF link annotation
- https://cdn-cms.f-static.net/uploads/4384825/normal_60130c798506f.pdfIn PDF document text
- https://patoduwewoz.weebly.com/uploads/1/3/1/4/131483118/7122353.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4530990/normal_60515ad93dedd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481158/normal_605f3ae0853fb.pdfIn PDF document text
- https://rogexufinijofe.weebly.com/uploads/1/3/1/1/131164439/gijukunolivoj-wunojetodatijez-xemurit.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465024/normal_602b72a8a9209.pdfIn PDF document text
- https://kowedanu.weebly.com/uploads/1/3/4/6/134687265/871ee01f483c3.pdfIn PDF document text
- https://mesenogixu.weebly.com/uploads/1/3/4/7/134736765/4485011.pdfIn PDF document text
- https://ditoxinenibon.weebly.com/uploads/1/3/4/3/134324582/petikizobori.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4473632/normal_603cb692366b6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448343/normal_602f498a2c961.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379984/normal_5feee8af65413.pdfIn PDF document text
- https://jexumaravoza.weebly.com/uploads/1/3/4/2/134265375/gubogawijefinuripevu.pdfIn PDF document text
- https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/faropolivupumis.pdfIn PDF document text
- https://bukekumagisalej.weebly.com/uploads/1/3/5/3/135333054/61f9e87c7296b0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405443/normal_6059c89cd8194.pdfIn PDF document text
- https://werofubokira.weebly.com/uploads/1/3/4/6/134656373/selawojiropu-nejupar-fupetojidix-talobajup.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://rorazokazog.pbworks.com/w/file/fetch/144505407/pigenafitikateku.pdfIn PDF document text
- http://kokoxudalux.pbworks.com/w/file/fetch/144427797/sky_high_2_tamil_dubbed_movie_download_single_part.pdfIn PDF document text
- http://tusawijer.pbworks.com/f/xisoboxepetaletupoxoze.pdfIn PDF document text
- http://funuvutidip.pbworks.com/f/pireresevigiwa.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e6ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6AB	5232 bytes
SHA-256: `1553849ba4fd0e73dde42eac4a4721bc31b6d2cb1c58a2728269e8a6fe8de899`
`font_01_sfnt_off0000f893.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF893	4692 bytes
SHA-256: `4b724c8ddeda69600853462bc4e49be3076a9c667d2c96f6b0ec3f8d7ac291d1`
`font_02_sfnt_off000106f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106F6	18956 bytes
SHA-256: `39c0d0a574897b115d738f7fda5a3b39ae84249edec2b42a143c99271ea8dcbb`
`font_03_sfnt_off000139fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x139FC	16184 bytes
SHA-256: `af2f16d3258c6a72a05047911e18461d1a0d7981365f33d42e1452fdd4c48605`

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