PDF malware analysis — malicious · 318614bf255c1f00

MALICIOUS

PDF

81.9 KB Created: 2021-04-23 23:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 6f2ec0e211cef522d974c1fa40c57343 SHA-1: d9c59e81707e64ae14653f29952ae6386fba1152 SHA-256: 318614bf255c1f007fb830e8d5fe0157c312e5f09bc81b010976b366ecccf0aa

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URLs, such as 'https://jottigo.ru/strik?utm_term=how+to+connect+sharper+image+wireless+headphones+to+phone', are likely used to redirect users to malicious sites. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a phishing or SEO spam attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=how+to+connect+sharper+image+wireless+headphones+to+phone PDF link annotation
- https://static.s123-cdn-static.com/uploads/4367277/normal_5ff2d6aec5bdc.pdfIn PDF document text
- https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/1834851.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4492278/normal_602518ce39ecf.pdfIn PDF document text
- https://sosanibizug.weebly.com/uploads/1/3/2/6/132695556/7175193.pdfIn PDF document text
- https://ruloxewetufo.weebly.com/uploads/1/3/1/1/131164393/8934825.pdfIn PDF document text
- http://xepuxupipe.mywebcommunity.org/libro_mordiendo_manzanas_y_besando_sapos.pdfIn PDF document text
- https://gasogufimuti.weebly.com/uploads/1/3/4/4/134461051/a5c1041.pdfIn PDF document text
- http://zukixulen.mypressonline.com/rrb_alp_result_2020_mumbai.pdfIn PDF document text
- https://sovewepipofev.weebly.com/uploads/1/3/4/8/134846449/ketidupolomutus.pdfIn PDF document text
- https://cdn.sqhk.co/dabeluza/ifhbifD/falulejugusadebozi.pdfIn PDF document text
- https://gurobikawa.weebly.com/uploads/1/3/4/4/134467096/gugodasijo_gusepaget_ketiwikusuvifod_niluwabeze.pdfIn PDF document text
- https://cdn.sqhk.co/pixazizaze/hjep9gc/strategic_human_resources_management_in_nonprofit_organizations.pdfIn PDF document text
- https://nemusadepupozug.weebly.com/uploads/1/3/1/4/131453027/wodug.pdfIn PDF document text
- https://cdn.sqhk.co/tovitaxani/jcvCIie/wigiretifuruvu.pdfIn PDF document text
- https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/rodox.pdfIn PDF document text
- https://cdn.sqhk.co/powitaxixu/g6Ezd3t/41561025881.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://godusisoti.onlinewebshop.net/19226930325.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_off0000f457.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF457	5328 bytes
SHA-256: `23a7a30e1337465465c1676d9c8a4015fd0cd863823e988e67b5fecb5a72b92d`
`font_01_sfnt_off0001064c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1064C	10996 bytes
SHA-256: `92978a0e42b05c00e0317817636c8224517a52cf59b8c6c55af23b6cdbf97e0d`
`font_02_sfnt_off00012bdf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BDF	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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