PDF malware analysis — malicious · e4d5335dece407e1

MALICIOUS

PDF

69.6 KB Created: 2021-03-01 18:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b9f9d990b5d73e27a610b733deb52087 SHA-1: 56cbeaf1daea00b9da079764aa0b7619ade17265 SHA-256: e4d5335dece407e1227a68108e2c6913805269ef637421a90392dac865061b12

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, indicating a link farm or redirection to potentially malicious sites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically. No scripts were extracted, but the presence of numerous external URLs points towards a phishing or malicious content distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9671

Heuristics 5

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.
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
External URI info PDF_URI

PDF contains an external URL action
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://leonvi.ru/aws?utm_term=how+to+reset+wallet+password+in+oracle+11g
- https://betufevu.weebly.com/uploads/1/3/4/0/134098732/419419.pdf
- http://ladekepevij.mygamesonline.org/mojagogoxiwurewekifakamap.pdf
- https://gonewama.weebly.com/uploads/1/3/4/0/134095907/837995.pdf
- http://gevifavilovaz.22web.org/statement_outstanding_invoices_template.pdf
- http://vorakumezaxof.mygamesonline.org/planeacion_estrategica_personal_ideas.pdf
- http://kolagozisil.mywebcommunity.org/how_much_foreign_aid_does_australia_give_china.pdf
- https://lasasozizo.weebly.com/uploads/1/3/4/0/134041343/8412047.pdf
- https://jononosafopobof.weebly.com/uploads/1/3/4/6/134649788/4351371.pdf
- https://zigajimimokok.weebly.com/uploads/1/3/1/3/131383588/gokodexifepubikixok.pdf
- http://talemine.getenjoyment.net/latezixoguliluj.pdf
- https://puwawegolawibot.weebly.com/uploads/1/3/2/6/132682739/f0adc29f12.pdf
- https://libepuve.weebly.com/uploads/1/3/1/4/131407284/pasozikogodukomoza.pdf
- http://kavelizopepi.mywebcommunity.org/the_sims_3_pets_pc_download_utorrent.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://tuguwobafadurot.rf.gd/94843694807.pdf
- https://s3.amazonaws.com/pazatuv/65292472951.pdf
- http://wifavar.epizy.com/application_for_marksheet_name_correction.pdf
- https://s3.amazonaws.com/mikibetiv/paripowonazimezudoled.pdf
- http://kizarepopudoso.epizy.com/fugexufidijuxopewejesome.pdf
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dfa1.bin` `c3bb54463e3a1e6fba4497ed87f370c400597425f591cd4d19ea50bccaa5cc5d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFA1	5348 bytes
`font_01_sfnt_off0000f1f1.bin` `0ecf9da9e35c8c0b89e2cb0d1f0fcec4868d1c352eedbe1ced31c790e6406deb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1F1	10516 bytes

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