PDF malware analysis — malicious · d4aef2cdafbb29ef

MALICIOUS

PDF

92.2 KB Created: 2021-04-26 21:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: fa8d46bf9904b579f734940dc78e1e54 SHA-1: 9f018821196283cb3d48385392398f9a5ba1757e SHA-256: d4aef2cdafbb29ef17954b0d6e6b1b4e16d8e0bc9dd00aa2934b4560f72d088f

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://botokaw.ru/strik?utm_term=kumon+math+worksheets+grade+2+free PDF link annotation
- https://gisipunav.weebly.com/uploads/1/3/1/6/131636927/zuborubitokizu_lujojozaku_vimag.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485576/normal_600ea5d9d63b5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4407084/normal_5ff3093a1858d.pdfIn PDF document text
- http://rifuxulalezi.iblogger.org/14635715716.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466379/normal_6011140ee13b0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424645/normal_60282dbc05f4c.pdfIn PDF document text
- http://petojasunegoda.iblogger.org/74519555976.pdfIn PDF document text
- http://fudasoba.iblogger.org/75777058556.pdfIn PDF document text
- https://rifuxegu.weebly.com/uploads/1/3/4/5/134525143/790eee.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460230/normal_6023dddae74cc.pdfIn PDF document text
- https://mokasinerosun.weebly.com/uploads/1/3/2/6/132682676/548fdaf6d4a4.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/sifawekujiki/system_analysis_and_design_course_outcomes.pdfIn PDF document text
- https://s3.amazonaws.com/viromibukoleliw/best_books_to_read_if_you_want_to_study_psychology.pdfIn PDF document text
- https://s3.amazonaws.com/mavixu/62185150263.pdfIn PDF document text
- https://s3.amazonaws.com/tokudapele/99723041973.pdfIn PDF document text
- https://s3.amazonaws.com/gajabedafot/rijarijidigaji.pdfIn PDF document text
- https://s3.amazonaws.com/jedadokuti/79237910295.pdfIn PDF document text
- https://s3.amazonaws.com/lorifumofelu/what_do_two_beta_glucose_molecules_form.pdfIn PDF document text
- http://gokimivux.rf.gd/betujudojekoxagelakolid.pdfIn PDF document text
- http://mawivevixovoxet.epizy.com/cell_death_apoptosis_and_necrosis.pdfIn PDF document text
- http://pimibini.epizy.com/ccavenue_android_sdk.pdfIn PDF document text
- https://s3.amazonaws.com/kefefetafij/explain_different_types_of_gears_and_their_applications.pdfIn PDF document text
- https://s3.amazonaws.com/jajoxulabojaso/what_is_the_moral_of_the_story_the_veldt.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://sinhala.sourceforge.net/In PDF document text
- http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
- http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000edb0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDB0	5544 bytes
SHA-256: `086ec318015cd10f72148d1102d37fdb4c67b9ccff6c2eb0c9e6f8b8fb35a208`
`font_01_sfnt_off00010032.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10032	25348 bytes
SHA-256: `1d8706a6535b5f64c7d8355e0ce5252170f36d335c6d7c534a6c54d6b361597a`
`font_02_sfnt_off00013b8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B8C	11684 bytes
SHA-256: `7701f6a49655c170b4142f3e3cf549a55b8aa2fe3af11709e382e5e426a51067`

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