PDF malware analysis — malicious · 46828c10b591dd67

MALICIOUS

PDF

87.0 KB Created: 2021-08-23 09:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: e8699e2dbaf6fa6faf13aa3246c973ec SHA-1: 59bf0f65c7aea0e5f2562c0fd02ccceabed7f38b SHA-256: 46828c10b591dd6778b436f3c2d6b890c205cf914e34c09d77c6414000ba2114

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farms hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and link farms points towards an attempt to redirect users to malicious websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9957

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://allytemp.ru/uplcv?utm_term=intermittent+fasting+2+weeks PDF link annotation
- http://staractivecollection.com/resimler/site/files/2321467864.pdfIn PDF document text
- http://cu-mbc.com/ckfinder/userfiles/files/95372919417.pdfIn PDF document text
- https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/fns7ijq1rabhkglba5veoansg1/wepewatutol.pdfIn PDF document text
- https://hiroyoung.com/data/files/81517604876.pdfIn PDF document text
- https://living-stone.lu/userfiles/files/98352054895.pdfIn PDF document text
- http://pc75.net/upfiles/file/1625615670.pdfIn PDF document text
- http://exclusivelimoservice.com/ckfinder/userfiles/files/78693249073.pdfIn PDF document text
- http://beloezoloto.ru/userfiles/file/8496356739.pdfIn PDF document text
- http://mulroyenvironmental.ie/userfiles/file/rogidawadulumifazenozog.pdfIn PDF document text
- http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160799114cf924---63280084216.pdfIn PDF document text
- https://mimpishio2bet.net/contents/files/kivewulux.pdfIn PDF document text
- https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/7mbuu4p2qk7kg86k4bbqp6rh97/27238996887.pdfIn PDF document text
- http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16097a9a9bd897---rinebufaxozalujizigi.pdfIn PDF document text
- http://hatowo.com/app/webroot/uploads/files/76344582496.pdfIn PDF document text
- http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf59e74d28---39080602433.pdfIn PDF document text
- http://dyglas.com/userData/board/file/4571560320.pdfIn PDF document text
- https://warungmimpishio.com/contents/files/98896597373.pdfIn PDF document text
- http://fournitures-reliure.com/prod_files/xowanakajusa.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/bd4fcd6b13c3ea65571e8f450c47125b/komak.pdfIn PDF document text
- http://auksozvynas.lt/userfiles/file/nudumiregukobogijap.pdfIn PDF document text
- http://anatolianlgs.com/userfiles/file/vidiruvevofe.pdfIn PDF document text
- https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/qpfj56ipj6j3rns8qcf1ie6jno/60387179211.pdfIn PDF document text
- http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3ea2b36a1---bafodoguxawalixepasuwuneg.pdfIn PDF document text
- https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/kh86pr8bdrri55pvh1j3knrim7/35995382202.pdfIn PDF document text
- https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/6s1f9vc4jtgni5sc7t4f2kftch/35951533722.pdfIn PDF document text
- http://aotwresort.info/ckfinder/userfiles/files/59106036293.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f222.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF222	10640 bytes
SHA-256: `888999c76a7cecd9ffa98aa93e00ffb5c4bf29a97460f0c778762792df42c4dc`
`font_01_sfnt_off00010a99.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A99	16568 bytes
SHA-256: `36424f75bff35dd6d70ffdc9f68a8b82273dd267cd5e6d07952242b401bf283a`
`font_02_sfnt_off000135cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x135CF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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