PDF malware analysis — malicious · 42d94931df376bdf

MALICIOUS

PDF

81.3 KB Created: 2021-03-24 09:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07

MD5: 596903511609ef260cbec7b1bfa86586 SHA-1: b05fd593228f6c7eaf3c7a6ac7d3519a8d0540ab SHA-256: 42d94931df376bdfc8a728bb45f543d5fc210158bb87bf5d26027acbeb2bb5f1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a malicious intent to direct users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature. The embedded URL 'https://dugedepap.ru/strik?utm_term=make+face+sketchup+2017+free+download' is a primary indicator of compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://dugedepap.ru/strik?utm_term=make+face+sketchup+2017+free+download PDF link annotation
- http://rafupufubed.mypressonline.com/bhagavad_gita_malayalam.pdfIn PDF document text
- http://gimemuwet.mypressonline.com/zebeb.pdfIn PDF document text
- http://rotiwopofeze.mywebcommunity.org/kojimudexasuviwibo.pdfIn PDF document text
- http://kefijor.mygamesonline.org/bal_ganesh_story_in_marathi.pdfIn PDF document text
- http://ritixibetono.mygamesonline.org/sasakunefofanugedex.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
- https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_99e6e6daf578493ab44b8aa1a48609d6.pdf?index=trueIn PDF document text
- https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_7a86e1c6db954d9283b24c5011141da0.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/wudibirewuduto/properties_of_2d_shapes_worksheet_grade_6.pdfIn PDF document text
- https://s3.amazonaws.com/tapelu/what_does_purgatory.pdfIn PDF document text
- https://s3.amazonaws.com/gewuwasi/how_efficient_is_the_internal_combustion_engine.pdfIn PDF document text
- https://s3.amazonaws.com/tinajabizoreguf/pdf_burdah_imam_busyiri.pdfIn PDF document text
- https://s3.amazonaws.com/betefowubevat/java_windows_7_ultimate_64_bit.pdfIn PDF document text
- https://564fd4a8-0e6d-4f97-813a-a14a70c45316.filesusr.com/ugd/f90d28_9932eda1082944f5872ccb138e32b8ca.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/sesijesule/nojulu.pdfIn PDF document text
- https://s3.amazonaws.com/niwotipugonuvoz/sweet_dreams_piano_sheet_music.pdfIn PDF document text
- https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_29dd586ba6af4b13b5c421c14b65b9f6.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xufaxoferugod/chrome_store_adblock_for_android.pdfIn PDF document text
- https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_16861e5b6a274b118fd77345099dc536.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/nabifovu/wowekezovogu.pdfIn PDF document text
- https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_b4563ec2283a40fbb64f9527f1f81daa.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/webipejonavuv/forklift_safety_checklist_template.pdfIn PDF document text
- https://s3.amazonaws.com/wovedukevikov/free_printable_nursing_concept_map_template.pdfIn PDF document text
- https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_df493b71c7444193b1d006d48f32b156.pdf?index=trueIn PDF document text
- https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_1dc61cdf46d540f38b7555bb7307ecf4.pdf?index=trueIn 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_off0000ede2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDE2	5644 bytes
SHA-256: `05cd77eb90b4e78ea2f9c96689872c6342a1344c86f50d8ca02f18f742d36802`
`font_01_sfnt_off0001013c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1013C	11400 bytes
SHA-256: `476e04bf8f64c4a15866c19ca459c4d838b105e0cdf5986cb0f5e5ed4b407d94`
`font_02_sfnt_off0001277c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1277C	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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