PDF malware analysis — malicious · 9f45a829593b37e4

MALICIOUS

PDF

83.6 KB Created: 2021-05-17 19:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 7e732addd57b7c5045a0a562604adf90 SHA-1: 7806237d39d756088cc4cfb01a3f083421bfc896 SHA-256: 9f45a829593b37e43ce1814c20cf93f87d42fb766fa84f8336fc6e4a1329ca30

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, with the primary link pointing to a URL that appears to be part of a phishing or ad-revenue scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs suggest a lure to external malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/strik?utm_term=top+10+classic+american+literature+books PDF link annotation
- https://betisokoredig.weebly.com/uploads/1/3/4/5/134505727/7800187.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465125/normal_604ddd219a34d.pdfIn PDF document text
- https://biziremidawa.weebly.com/uploads/1/3/5/3/135397591/lotakudukeg.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4389809/normal_5ffb439c213e6.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4467273/normal_6006573c36511.pdfIn PDF document text
- https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/fojusidopebitu_wavizujom_nefedonenugopi.pdfIn PDF document text
- https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/mened.pdfIn PDF document text
- https://lifefoxametuzov.weebly.com/uploads/1/3/1/3/131383893/bujejuxiw.pdfIn PDF document text
- https://lotigasi.weebly.com/uploads/1/3/4/7/134705720/dajugufa.pdfIn PDF document text
- https://puzilefamurujuz.weebly.com/uploads/1/3/2/7/132712080/5912124.pdfIn PDF document text
- https://liwufetut.weebly.com/uploads/1/3/4/5/134596667/tazutebikizeg.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://s3.amazonaws.com/vukujidor/stage_4_brain_cancer_glioblastoma_multiforme.pdfIn PDF document text
- https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_ce17d52e4d4e4554b41f442d9213d572.pdf?index=trueIn PDF document text
- https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_2afb2cc0434d433e88053ddcee837866.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/gateme/mupipidiwukafadowaw.pdfIn PDF document text
- https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_5e4109b0eacf40668f5640ffca4f7ea2.pdf?index=trueIn PDF document text
- https://f568b852-d776-40fc-afde-b4c2ef929a3a.filesusr.com/ugd/2d6fb2_9fb56782dd71495bbe7c562662e92c84.pdf?index=trueIn PDF document text
- https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_c18598a95b704e198b8b705cb4d1454e.pdf?index=trueIn PDF document text
- https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_b59c382e6e47436f8554c3934311fdb6.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/ponivotigegepub/nujepusejubefumap.pdfIn PDF document text
- https://s3.amazonaws.com/tojazudibumogab/beautiful_boy_baby_images.pdfIn PDF document text
- https://s3.amazonaws.com/jonora/what_is_the_main_idea_of_the_story_beowulf.pdfIn PDF document text
- https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_b5d521fbe9d54a9da77c28e926dfbbf7.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_off0000f75d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF75D	5308 bytes
SHA-256: `e51ac830dd43c5ff587918c983692dbd600b000d95b03cbb86c363e0e8ff232f`
`font_01_sfnt_off00010947.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10947	11644 bytes
SHA-256: `796567d5582987cac204a3442c5efbafb0ac5d81db79c3b223ca5a56105217be`
`font_02_sfnt_off000130bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x130BC	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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