PDF malware analysis — malicious · 3bd11a22dbef7d1e

MALICIOUS

PDF

80.3 KB Created: 2021-04-09 04:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 25dd605e902333d4ed5f2712b7c3d53d SHA-1: e5adf4b925b2f95756fa78bc8abdb0b5605ca646 SHA-256: 3bd11a22dbef7d1ed9296679abcebec0f8fc00af82872757c61f7a8f29642136

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to lead users to external, potentially harmful, sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

Heuristics 5

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.
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://midufefew.ru/strik?utm_term=cual+es+la+diferencia+entre+in+y+at PDF link annotation
- https://cdn.sqhk.co/gofelaxes/jjjbpqD/fist_of_fury_full_movie_bruce_lee.pdfIn PDF document text
- https://cdn.sqhk.co/xamizine/aQgehbb/36576045279.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393751/normal_60551a95a99a5.pdfIn PDF document text
- https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/liwuvufuzaraf-ginedaxi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4501804/normal_606a1f61775e7.pdfIn PDF document text
- https://cdn.sqhk.co/nufuwijili/ggN4uhg/jorusogerurofadag.pdfIn PDF document text
- https://pidujalibogi.weebly.com/uploads/1/3/1/3/131380128/7830e1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458852/normal_6019270c06121.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453719/normal_60224a5a5a920.pdfIn PDF document text
- https://tefojemitadu.weebly.com/uploads/1/3/1/6/131606809/dadoradobe-fevabuvofomiwuv-naxisexolosirip.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480732/normal_60591be6df9a5.pdfIn PDF document text
- https://cdn.sqhk.co/japewaturu/jNWhbyD/kakenulewipodap.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/pusori/bexogifawag.pdfIn PDF document text
- https://s3.amazonaws.com/woxotopapozokev/81921884519.pdfIn PDF document text
- https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_27f69bf96449493ba8c9fde43e46a879.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/wujixus/avira_phantom_vpn_crack_android.pdfIn PDF document text
- https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_63ceb44a9f26493f946db8fbd3fa2729.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/topipovikapari/22552473099.pdfIn PDF document text
- https://s3.amazonaws.com/nigimul/xotopuw.pdfIn PDF document text
- https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_4d283368f9bc4913b7e85b7a66560a0c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/divelikubapiwaj/10656781683.pdfIn PDF document text
- https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_8c682b48f06a463287fb717bc7486eb6.pdf?index=trueIn PDF document text
- https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_63b0b1778e6543d19ffbc79dad64e233.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/punagilelabon/ball_canning_guide_green_beans.pdfIn PDF document text
- https://s3.amazonaws.com/bisapovepizaj/pokemon_shiny_gold_sigma_x.pdfIn PDF document text
- https://s3.amazonaws.com/fatikonavori/h81m-p33_motherboard_drivers.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_off0000f5cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5CB	5020 bytes
SHA-256: `95570a5c68d4e75f4ef21e7cd217feb9f2d21daf09a20c7459c7c4849775d878`
`font_01_sfnt_off000106eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106EB	1852 bytes
SHA-256: `30d16f7417f0add8d0285b648bbaf00e913f8a8b98029eef0ba4a775d80cd2e5`
`font_02_sfnt_off00010fdd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FDD	10292 bytes
SHA-256: `f317e3075fd81e306d7f0b9b51fd8021b1cc1b6e4a486569ffca6b02ce7d8761`

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