PDF malware analysis — malicious · b8290575b8bebb36

MALICIOUS

PDF

78.0 KB Created: 2021-01-26 10:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07

MD5: e7316321dcaf8280b2a9bb55c9e8db96 SHA-1: 19b38044b3bc8c49f6c26f3871f87509e3dd9968 SHA-256: b8290575b8bebb3641555bd2d3f8e579b7aa51e95f1a424e5d92557d639dea10

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to flight status, suggesting a lure to a phishing or malware distribution site. The presence of embedded URLs and the nature of the heuristics indicate this PDF is designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://baarspo.ru/123?utm_term=ai+126+flight+status+delhi+to+hyderabad PDF link annotation
- https://static.s123-cdn-static.com/uploads/4418556/normal_5ffdd66848695.pdfIn PDF document text
- https://cdn.sqhk.co/majumoros/jjijgie/76650354773.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4467945/normal_5fe7a29dbd44c.pdfIn PDF document text
- https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/simajepud-sojuropomelu.pdfIn PDF document text
- https://cdn.sqhk.co/dopuwene/gidjcMI/38874680021.pdfIn PDF document text
- https://cdn.sqhk.co/xogodapap/zRDifgh/sisters_of_mercy_nuns_abuse.pdfIn PDF document text
- https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/sasexivudas.pdfIn PDF document text
- https://cdn.sqhk.co/gubogezemazo/ic0GQhc/18101718620.pdfIn PDF document text
- https://zotolibufu.weebly.com/uploads/1/3/1/0/131069899/bululekaj.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4366660/normal_5fe4e6a3b9319.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4448346/normal_5fffb781afe73.pdfIn PDF document text
- https://xexibufit.weebly.com/uploads/1/3/0/7/130739933/zudowopemefiz_gabapofe_zamejixodulek.pdfIn PDF document text
- https://mafoxoluz.weebly.com/uploads/1/3/1/4/131483222/895094.pdfIn PDF document text
- https://sivevaredewiw.weebly.com/uploads/1/3/4/4/134464028/82d01930.pdfIn PDF document text
- https://kumaradogutaf.weebly.com/uploads/1/3/0/7/130775833/bivanopew_samavulukuze.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489601/normal_5fe6b0f371bb5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4496853/normal_5fcb317245509.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4381291/normal_5fe5dc42aa79b.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/robumuduluwise/21540192792.pdfIn PDF document text
- https://s3.amazonaws.com/penale/explore_learning_student_exploration_electron_configuration_answers.pdfIn PDF document text
- https://s3.amazonaws.com/vudivuzakal/24269674863.pdfIn PDF document text
- https://s3.amazonaws.com/pozokimepe/80183966784.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://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_off0000dd50.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD50	5640 bytes
SHA-256: `3642a554308a191f38f6d895753fb8cad7b140ae3b66321df0df383fedccdca7`
`font_01_sfnt_off0000f10a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF10A	5736 bytes
SHA-256: `ef290943d2bf22423d50d4b44ed98ae9d34059d7de82094b61059fc73c64ebc8`
`font_02_sfnt_off0001049a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1049A	11460 bytes
SHA-256: `50cc140af45e57aeca7b50b76bd9efd77d7bfd7f424d4af4ea5ff2a7002bf832`

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