PDF malware analysis — malicious · 53758cb031eb66f6

MALICIOUS

PDF

80.9 KB Created: 2021-03-09 06:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: de387a7101bd5cb2f7fe57c22742e6fe SHA-1: ca4c649f84264c19c0e2b31c5175a0598cc32185 SHA-256: 53758cb031eb66f62316acb7a75457d09bbaad5c2dadc6d008b5ab9cc148e364

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with a significant number pointing to PDF files, suggesting a link farm or redirection mechanism. One prominent URL, 'https://jottigo.ru/strik?utm_term=singular+and+plural+nouns+worksheets+ppt', appears to be a lure for phishing or malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or a trojan.

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://jottigo.ru/strik?utm_term=singular+and+plural+nouns+worksheets+ppt PDF link annotation
- http://vekenuv.iblogger.org/gusuvepitagajanimujidu.pdfIn PDF document text
- https://favimorujupufu.weebly.com/uploads/1/3/2/7/132710565/ae9620333.pdfIn PDF document text
- https://juposuwidamad.weebly.com/uploads/1/3/1/4/131406248/buxawi.pdfIn PDF document text
- http://zazorin.scienceontheweb.net/what_is_the_main_message_of_the_tell_tale_heart.pdfIn PDF document text
- https://diwekivoveludu.weebly.com/uploads/1/3/5/3/135313391/venupuxajezeja.pdfIn PDF document text
- https://kojepogezoxuta.weebly.com/uploads/1/3/4/4/134487575/juxez.pdfIn PDF document text
- https://lexobuto.weebly.com/uploads/1/3/2/7/132740623/xujomififoj.pdfIn PDF document text
- http://xufelaketodo.getenjoyment.net/how_to_verify_iso_27001_certification.pdfIn PDF document text
- http://zoluwofemofuper.sportsontheweb.net/36784210044.pdfIn PDF document text
- https://bupagaxeni.weebly.com/uploads/1/3/4/7/134706040/3604483.pdfIn PDF document text
- https://mefimume.weebly.com/uploads/1/3/1/4/131437875/fefuziba.pdfIn PDF document text
- https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/9448741.pdfIn PDF document text
- http://tanivikovome.sportsontheweb.net/31585221716.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/sevoga/binaural_beats_therapy.pdfIn PDF document text
- https://s3.amazonaws.com/zobuwubedak/zizadupavu.pdfIn PDF document text
- https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_4d67b41b8b5d4888ac665bef7965e6a8.pdf?index=trueIn PDF document text
- https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_471cd945b77a408dae2a658c735e6a41.pdf?index=trueIn PDF document text
- http://zesexabipezu.epizy.com/binekorolijinagiv.pdfIn PDF document text
- http://kukadafimi.rf.gd/best_naruto_shippuden_game_for_android.pdfIn PDF document text
- https://s3.amazonaws.com/wiremeresegikon/28296784233.pdfIn PDF document text
- https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_4d02eb7a9c324df6a5a16f7f295af76f.pdf?index=trueIn PDF document text
- https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_53d2ce76bf0447e394f813ca6bb15be7.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/wefadep/69726031575.pdfIn PDF document text
- https://s3.amazonaws.com/wewuxuviwar/divirinomipupuzufulal.pdfIn PDF document text
- https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_cc23ccbb346d4a4396fa98faed9a3ca6.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_off0000ec27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC27	3304 bytes
SHA-256: `e9df1abf47a688c52bbf36275161d4c71dd3d5463c3e540779115c3c600865d9`
`font_01_sfnt_off0000f80d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF80D	5480 bytes
SHA-256: `fe62853a522b1f580fca82ccf752bde9852f59cb89f9f0c58886dffb0803a76f`
`font_02_sfnt_off00010abb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10ABB	12464 bytes
SHA-256: `bc2e4954967181c1792ddee28f881f6d32dd8ee5844c5010c70f3c32e70f7e00`

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