PDF malware analysis — malicious · 9b7e5969619a95b0

MALICIOUS

PDF

77.5 KB Created: 2021-03-19 07:22:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 45e025a4d3d70cefd1cf84372cf6a977 SHA-1: aeed3d1654865ea7f698bcd52d6eb337dae05e8b SHA-256: 9b7e5969619a95b0d4e3f90eb0643675f5fa947f28190b2760ef7e108759202d

144 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains heuristics indicating it is part of an SEO link farm and uses an image lure to redirect users to a URL associated with 'covet fashion hack reddit'. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of external links and the SEO link farm heuristic suggest the primary goal is to drive traffic to malicious or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 6

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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/wix?keyword=covet+fashion+hack+reddit PDF link annotation
- https://bejivuvepezera.weebly.com/uploads/1/3/4/4/134437422/vozeniw.pdfIn PDF document text
- http://midimox.getenjoyment.net/60584723724.pdfIn PDF document text
- http://silekutum.medianewsonline.com/24874524865.pdfIn PDF document text
- http://zilitimo.getenjoyment.net/download_to_excel_converter_online.pdfIn PDF document text
- http://palubofapejuraw.mywebcommunity.org/camtasia_8_user_guide.pdfIn PDF document text
- http://sidufapas.mywebcommunity.org/61465863223.pdfIn PDF document text
- http://rasudilikid.mywebcommunity.org/flor_de_leyendas_alejandro_casona_gratis.pdfIn PDF document text
- https://nasabera.weebly.com/uploads/1/3/4/4/134447265/1155841.pdfIn PDF document text
- https://rarowovi.weebly.com/uploads/1/3/4/6/134664267/628729b0688b.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/pipaneku/lagu_melayu_free_terbaru.pdfIn PDF document text
- https://s3.amazonaws.com/tubupejevomo/21575404317.pdfIn PDF document text
- https://s3.amazonaws.com/xeponodij/how_to_make_skinny_guy_build_muscle.pdfIn PDF document text
- https://s3.amazonaws.com/jupudizadid/2415372167.pdfIn PDF document text
- https://s3.amazonaws.com/luramamelolem/98209036789.pdfIn PDF document text
- https://s3.amazonaws.com/tubukeganuji/3955203056.pdfIn PDF document text
- http://kopolug.myartsonline.com/kenmore_refrigerator_ice_maker_not_working_no_water.pdfIn PDF document text
- https://s3.amazonaws.com/kavugusepe/cognizant_technical_interview_questions_with_answers.pdfIn PDF document text
- https://s3.amazonaws.com/fenatagazise/corporate_social_responsibility_policy_uk_template.pdfIn PDF document text
- https://s3.amazonaws.com/votuweroxigezog/zesurepoxugurefitu.pdfIn PDF document text
- https://s3.amazonaws.com/rekawexuretowo/69302865200.pdfIn PDF document text
- https://s3.amazonaws.com/fefurorobumi/wexavonut.pdfIn PDF document text
- https://s3.amazonaws.com/tiluwisulepam/jorge_luis_borges_hechos_importantes.pdfIn PDF document text
- https://s3.amazonaws.com/satudifin/100_cotton_bed_sheets_set.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f1b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1B3	5108 bytes
SHA-256: `5dff220bad7e8f5ffd2fd2a0ccc0419ef6b0af364054cb25dc84e047fa033ed6`
`font_01_sfnt_off00010312.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10312	10984 bytes
SHA-256: `5d032699b07a4a2b8456535df2bcf7cd4904307108e5fc96aa92b445c2fece2e`

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