PDF malware analysis — malicious · 6e523e9129c9782c

MALICIOUS

PDF

74.9 KB Created: 2021-02-25 02:03:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 9c8016e71b96957170590025857905b8 SHA-1: 55fa502af32c310b01aeae34764daeb23c2c5960 SHA-256: 6e523e9129c9782cc7f387ec24d99ee44a649f5a23db2582f0e9cdf2aa765e91

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by both ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, suggesting it's part of a link farm or phishing campaign designed to redirect users to potentially harmful websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate that the primary goal is to drive traffic to external resources, likely for malicious purposes such as credential harvesting or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/award?keyword=how+to+charge+black+and+decker+drill+battery PDF link annotation
- https://giduwopevaxotos.weebly.com/uploads/1/3/5/4/135401458/fd6609ba95.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4467038/normal_601da454aa3c9.pdfIn PDF document text
- https://fesubinilare.weebly.com/uploads/1/3/1/8/131856970/zikan.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486354/normal_6010a2178fc47.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366623/normal_5fc66ef135c89.pdfIn PDF document text
- https://safipeta.weebly.com/uploads/1/3/1/4/131408280/5101043.pdfIn PDF document text
- https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/zebilodozaxakeji.pdfIn PDF document text
- https://rurajutudap.weebly.com/uploads/1/3/1/4/131437622/rowowetupafeluj_sevijubez_bojasoloxeruna.pdfIn PDF document text
- https://vimititop.weebly.com/uploads/1/3/4/3/134339659/fiwugerekano.pdfIn PDF document text
- https://paludiwebi.weebly.com/uploads/1/3/4/0/134012690/fobalilatimoseti.pdfIn PDF document text
- http://igme.site/protocollen_van_de_wijzen_van_sionnqqko.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4389365/normal_5ff0d6193a421.pdfIn PDF document text
- https://zoxanomo.weebly.com/uploads/1/3/1/1/131163640/7987740.pdfIn PDF document text
- https://vetitigozep.weebly.com/uploads/1/3/1/4/131437709/tobidivitufowe_minifuxixiz_teruriwilunevi.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/dusined/girofewa.pdfIn PDF document text
- https://s3.amazonaws.com/fuwuzerijofa/52882878197.pdfIn PDF document text
- https://s3.amazonaws.com/tejuvonixag/java_spring_annotations.pdfIn PDF document text
- https://s3.amazonaws.com/sorogamat/85466576587.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000edb9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDB9	5380 bytes
SHA-256: `deafe521188aa672afa1d5bd71e648ffca0180406a5b49d29f7c57f780af655c`
`font_01_sfnt_off00010013.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10013	10536 bytes
SHA-256: `e127017fbd8a64e08e41667d248630eda7405bf32dcd664f424b0f421ea09c9f`

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